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Extinction Cycle #1

Extinction Horizon

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The worst of nature and the worst of science will bring the human race to the brink of extinction... Master Sergeant Reed Beckham has led his Delta Force Team, codenamed Ghost, through every kind of hell imaginable and never lost a man. When a top secret Medical Corps research facility goes dark, Team Ghost is called in to face their deadliest enemy yet--a variant strain of Ebola that turns men into monsters. After barely escaping with his life, Beckham returns to Fort Bragg in the midst of a new type of war. As cities fall, Team Ghost is ordered to keep CDC virologist Dr. Kate Lovato alive long enough to find a cure. What she uncovers will change everything. Total extinction is just on the horizon, but will the cure be worse than the virus?Self-publishing sensation and USA Today bestseller Nicholas Sansbury Smith comes to Orbit with the first book in his propulsive post-apocalyptic series about a soldier's mission to save the world.The Extinction Book 1: Extinction HorizonBook 2: Extinction EdgeBook 3: Extinction AgeBook 4: Extinction EvolutionBook 5: Extinction EndBook 6: Extinction Aftermath

356 pages, Kindle Edition

First published December 6, 2014

1202 people are currently reading
5880 people want to read

About the author

Nicholas Sansbury Smith

110books2,296followers
Nicholas Sansbury Smith is the New York Times and USA Today bestselling author of more than forty novels with two million copies sold. Before his writing career, he served at Iowa Homeland Security and Emergency Management, a background that inspired many of his story concepts. A two time Ironman triathlete, he enjoys running, biking, and hiking. Nicholas also loves traveling, especially to his cabin in Northern Minnesota where he weaves his tales. He lives in Iowa with his wonderful wife and their son and daughter.

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5 stars
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Displaying 1 - 30 of 599 reviews
Profile Image for PirateSteve.
90 reviews388 followers
September 25, 2017
This guy, Nicholas Smith, certainly can write a fast paced SciFi thriller.
The plotting was realistically done on how a bio-weapon/virus can be created and then the accidental outbreak.
Also a good mix of medical vs. military follow through.
Profile Image for Zain.
1,826 reviews251 followers
August 28, 2023
Not Enough People!

On the day that the world goes to hell, Reed Beckham, leader of the Delta Force Team, code named Ghost, is called upon to investigate why a top secret medical research facility goes dark.

The research facility is experimenting with a variant form of Ebola. The strain is so dangerous that men are turned into violent, raving lunatics.

Too late to prevent the release of the virus into the world population, Reed and his team can only observe the world fall apart.

The book has lots of good thrills and the horror is terrific, but I just don’t understand why only six people are sent to fight these monsters?

Sometimes only three are sent.

Come on! You need more people than that! 😎

Four stars! 💫💫💫💫
139 reviews197 followers
August 13, 2016
This is second time I've read this book, and for reasons I can't quite ascertain - I seem to have enjoyed it more than my first read- through.

This is a hybrid of military and medical horror. On July 10th 1968, First Lieutenant Trevor Brett and thirty one marines, are dropped off (via UH-1 Huey helicopters) into the swamps of South Vietnam; their target is a remote village. As they approach their destination, Brett and the other marines have orders to use an experimental drug (VX-99), which they administer via a syringe; directly into the bloodstream. Brett has his reservations about taking the drug - but orders are orders - and not long after taking the substance, Brett and his troop of marines experience intense pain, hallucinations and a strong desire to kill. Whatever was in the syringe; has a major side-effect - and this is where they all turn on each other and literally tear one another apart, ultimately ending with one sole survivor.

Forty seven years later, two Doctors visit a village in Guinea - where there is an outbreak of Ebola. When Dr Chad Roberts and Debra Jones enter the hut of two victims, he sees a man and woman hemorrhaging from every orifice. He quickly takes a sample from one of the infected - then gets the hell out of Dodge.

Elsewhere, a team of Delta Force Operatives: codename Ghost, gets activated. They get activated in the most critical conditions. Master Sergeant Reed Beckham, Horn, Riley, Carlos, Edwards, Tenor, Spinoza and Dr Pat Ellis are sent on a mission to San Nicholas Island (off the coast of California), to find out what has happened to a facility; known as Building 8, which deals with the most lethal contagions: Level 4 biohazards. The reason for them being sent there is: there has been no communications contact with the building for a number of days, so Team Ghost gets the task of trying to ascertain the fate of the ten scientists that work there, and to recover a sample of what Dr Medford was working on.

I really liked this book. The team dynamics between Team Ghost, and the way the story vacillated from Team Ghost to what was happening in the background with the medical personnel. I'm not sure how kosher the medical side of things were, but it seemed pretty believable. I also liked the conversations between the medical scientists as they try to figure out how to survive the apocalypse. This is not a zombie apocalypse type of book; it's what happens when people mess around with viruses; try to make a bioweapon out of it - and in this case, the result is evolution, I guess.

I've read the first four novels in the series, and recently bought the fifth - Extinction Cycle: The End. Then find out there's a sixth book in the series - Extinction Cycle: Aftermath.

Anyway, it's full of action, revelations, conspiracy - and barely stops to take a breath. I'll have to read more by this author.
Profile Image for Mike (the Paladin).
3,148 reviews2,091 followers
October 31, 2015
Humm, well I'd say that this is a high 3. I considered a 4 but really couldn't quite go there. I do think I'll eventually try the next in the series, maybe not right away, but eventually.

So, what do we have here? The synopsis tells us it's an extinction event plague that turns some of it's victims into monsters. What we get is the zombie apocalypse... Well, not precisely as the people/monsters aren't truly the 'walking dead" except in the sense that they have the plague.

I said elsewhere (as I was starting the book) that I'd call it The Stand meets The Walking Dead. My opinion hasn't changed.

I've mentioned in other reviews that the fact an idea or plot has been used before doesn't (in general) bother me. There can only be so many actually original plot/story ideas and we're dealing with thousands of years of oral and written story telling. Still those ideas need to be used in original or at least creative ways.

In this book you're going to get some cliches, some characters you've seen before and some pretty standard ideas, plot points and even story line. I also take issue with the way some of the characters are presented... That's just me however. I think many military people may feel this way.

I'll not mention any of the cliched parts as that's spoiler territory...don't worry I figure you'll spot them.

Still the book is full of action and the story flows pretty well. I know a lot of people just like zombie apocalypse or post apocalypse stories and this seems to be starting a pretty good one. With some slight reservations I can recommend it if you know you're getting brain candy.

Enjoy.
Profile Image for Faith.
2,150 reviews656 followers
August 11, 2016
After reading Hell Divers by this author I was expecting something more imaginative. This book was just a generic escaped killer virus thriller, with maybe more gore than usual. I've probably read too many of them to be impressed anymore. I also didn't care for the narrator of the audiobook so I abandoned the book about one third of the way in.
Profile Image for Ms. Nikki.
1,053 reviews320 followers
April 15, 2016
I'm going to get straight to the point. This read felt recycled. Of course this subject has been written about a gazillion and 1 times, but a writer's voice should be able to change a read, even if it's only subtlety so.

The cadence of this story didn't seem to change even when voices were raised. There wasn't enough tension. Phrasing was amateurish. So were the military that didn't seem to know what to do or how to respond when things got real.

I read the Orbs series and I would have liked to have had more of an emotional bond with some of the characters. Throughout that (Orbs) series, Mr. Smith got better with each read. Characterization became stronger and by the second book you really cared what happened to the characters.

The world-building in Horizon was kinda vague. What did other people experience? This was a worldwide incident, but yet we don't get a real visual other than what some of the military and news lets us hear and the overly-long introspective moments Beckham gives us.

Sometimes it takes me a minute to get absorbed in a new read, but by the end of this story I felt it was lacking some integral pieces to make this story memorable.

Hoping the author is more comfortable with his characters, more descriptive of the effect of this virus, and has a more realistic interpretation of the military in the next one.

2.5 Tension-less stars
Profile Image for Michael Flanagan.
495 reviews24 followers
December 19, 2014
I am fast running out of superlatives to describe just how good Nicholas Sansbury Smith is. After being blown away by the first two books of his Orb series this year, this tireless author has crafted yet another exquisite read.

After showing us his mastery of the Science Fiction genre he has now turned his hand to a modern day tale of a truly apocalyptic nature. This books combines some my favorite elements of virology, genetic manipulation, horror, action, suspense and zombie like mayhem. One of the major ingredients in this story is that most insipid of virus Ebola, and this for me is what made the read all the more frightening. The author has also once again shown his ability to develop characters in a way that draws you into the story and makes you feel like you have a vested interest in it.

I look forward to seeing where the author takes us in this series. Nicholas Sansbury Smith has well and truly arrived and I predict his star is on the fast track to the top.

Profile Image for Kay.
2,211 reviews1,166 followers
January 8, 2019
My first Nicholas Sansbury Smith book and it's a fun one. As a fan of zombie movies and Outbreak style films this book combines some of both. A nice change from the usual YA apocalyptic books I have read.
Profile Image for Anthony.
Author156 books350 followers
December 10, 2014
Terrifying and thrilling, Extinction Horizon blends elements of genetic engineering and viruses that might be found in a medical thriller with the action you'd expect from a military sci-fi-esque book. The blending of genres and concepts made this an interesting ride through and through. While the suspense during the military portions of the book kept the pages turning, you can't help but be intrigued by the scientists' endeavors as well. If Michael Crichton wrote a "zombie" book, this would be it.
Profile Image for Nikki "The Crazie Betty" V..
803 reviews127 followers
December 23, 2014
Loved it! Wished the 2nd book was out already. If you’re a sci-fi fan who has yet to read a Nicholas Sansbury Smith novel…well then, shame on you! This is a must read for anyone who enjoys a good apocalyptic, zombie-esque, horror, suspense, or medical thriller. There isn’t too much of any one of these elements in Extinction Horizon that would lead me to believe a reader with interests in ANY of the aforementioned genres wouldn’t thoroughly enjoy this new series.

Nick gives us very believable characters with solid backgrounds and not too much telling. The characters range from all levels of military personnel to scientists of high caliber, not to mention some truly terrifying monsters that could only be imagined by someone who has done their research into the realistic possibilities of such an outbreak. I would LOVE to find someone to do some concept art around what these creatures look like. The way they are described in the story is so chilling and creepy and I can’t help but think that the way I picture them in my mind isn’t even close to how freaky they would actually be.

Taking the already fear inducing Ebola virus, Nick contrives a truly terrifying and real story about what would happen if such a virus were transformed into a biological weapon, and what the implications would be to the entire human race. The amount of research done to be able to interweave virology, genetic mutation, and evolutionary biomechanics is astounding and cannot be overlooked; especially if you already have an interest in these subjects. Nick does a great job of including these as very prominent and important aspects of the book but does not go into so much scientific detail so as to take away from the nature of the story and the people living it.
Here are some other things I liked:

-The scientifically grounded theory regarding primal/dormant genes still contained in our genetic code.

-No real solid solution to the outbreak. Such as every single virus and bacteria in the world, it doesn’t affect everyone the same and the mortality rates do not apply to all, as there are always going to be a small fraction of people who are naturally immune to any given disease. We see this in the very climactic and action-packed ending to the first book in this series.

-Humanity doesn’t completely disappear from the monsters due to where the mutation originated and how it maintains symbiosis with the host. Humanity just reverts back to a much more primal, archaic, and violent time in our species� history.

-No real romantic plot to get in the way of the action.

-Government conspiracies

-Life isn’t about “happily ever afters� and neither is this story. This makes it so much more realistic. The good guys don’t always win and the bad guys don’t always get what’s coming to them.

-There is going to be a sequel to the story but I didn’t feel like Extinction Horizon ended in a way where waiting for the next book would be out of the question. I finished feeling very fulfilled but will still be very excited to continue with the story.

-Last, but definitely not least, I totally enjoyed the absolute gruesomeness of this read. There are some truly horrific and terrifying things that happen in this book and Nick didn’t hold any punches.

I will continue to read Nick’s books as I truly consider him to be a great author who brings a fresh new take to the sci-fi genre. There aren’t many books out there anymore that can not only keep me on the edge of my seat, buy hold my interest so completely that I’m constantly thinking about when my next break at work will be so I can keep reading.

I received a free eARC from the author in exchange for my honest review.
Profile Image for Sleepy Boy.
953 reviews
February 10, 2021
This was a fun sci-fi horror shoot 'em up. You're not going to find any amazing dialogue or plot but what is here is a great distraction.

I really enjoyed the author's take on the infected, and do appreciate his attention to detail in terms of firearms. The back and forth between the action and the science aspect was good pacing as well.
Profile Image for Samyann.
Author1 book83 followers
September 1, 2015
Audible Audiobook

The Extinction Cycle series is read by Bronson Pinchot, and consists of at least four novels. This review addresses only the first two. In the area of ten hours each, the stories address the the extinction of the human race. The plot, characters, and story moves seamlessly from novel one through novel two; I cannot speak to the other books in the series. The fundamental premise surrounds the accidental creation of a bio-weapon intended to produce ‘super� soldiers. An oops that mixes the virulence of the ‘super� soldier chemicals and the Ebola virus is the cocktail that turns humans into monsters � or zombies. Swollen eel-like-sucker-lips, clicking joints, yellow eyes with slits for pupils �. familiar description? Within a week or two billions across the world die. No secrets given, you’ll figure this out very early in book one.

Personally, I’ve a problem with a virus traveling so fast, especially one that is not air-borne. There is little, if any, mention of fundamental supplies, i.e., food, medicine, gasoline, etc., in addition to characters devoted to this issue. How exactly people can survive without basic necessities isn’t a factor, nor is it mentioned. The books are focused on military efforts, a few type A Delta Force dudes, and a young female scientist. Suspending belief, however, is a requirement in order to enjoy science fiction. So � suspend.

I don’t plan on finishing the series, in that fundamental survival issues, given the scenario, aren’t addressed. The narrator’s interpretation of the female scientist brings forth a frightened teenager instead of an educated, intelligent woman who is saving the world. She’s whiny and valley-girly. The zombie-monsters are one dimensional, the description like any made-for-TV creature-feature zombie, the soldiers stereotypical. Audible’s Daily Deal was motivation for book one, giving the author benefit of the doubt, book two. I’m not motivated enough to continue.

If you’re a die-hard SciFi and apocalypse or zombie fan, you’ll find something to enjoy. Extinction Cycle is getting good reviews, ergo I’m probably nuts to have a ‘meh� opinion. The author is pretty conscientious with regard to blood, guts, puke, making things scary � I guess.
Profile Image for Willow Brooks.
Author3 books58 followers
March 7, 2016
This could REALLY happen!!! Now I'm all freaked out! I feel like I need to prepare myself because some idiot in power could really create a warfare virus that could turn this world upside down.

It took me a minute to get into this story and I thought I was not going to like it, but I think it was because my hubby kept interrupting me. Once I got into it and started getting to know the characters a bit, and reading about all the crazy crap that happened in the beginning, it took off.

Action, science, a hint at romance, humans turned into mindless *Not Zombies*. Intelligent people on the search to fix what government has broken. What is there not to like. I could definitely tell that this author had to have invested a significant amount of time into researching science etc. that's how convincing this tale is. Wow! I already don't trust government, and now I REALLY don't trust them.

I'm convinced this author is some kind of retired secret agent scientist for the FBI, CIA, NSA or something. I'm going to the next book, even though I'm supposed to be reading an ARC for someone. I just have to know what happens with these new intelligent beings.
Profile Image for LIsa Noell "Rocking the chutzpah!".
736 reviews510 followers
November 13, 2021
I've read so many zompoc books over the years that it really takes a lot to impress me. This book didn't impress. That's not to say that it was awful, because I liked the story. I just wasn't rushing through it like I normally do. I did like the science. I don't "science," but this worked for me. The military jargon was kept to a minimum, which I appreciate as all those initials for things that I don't know are too much at times. Mr. Smith did a great job with characters, and I'll admit that I'll probably read the next book or two just because of the people in this book. Lastly, those zombies were some scary sons of guns. Think Spider-zombie, with leech lips! My main complaint though was there was too little action. Lots of missions, but the heart in my mouth, screaming "good God, y'all" type of scares weren't there. That's why I read these type of books. I'll be reading a few more of these Extinction books, but right now I can only give it an average rating. Here's hoping it will pick up the pace. My thanks to Netgalley and Orbit for the e-book.
Profile Image for Badseedgirl.
1,453 reviews76 followers
July 1, 2021
If a reader enjoys Joe Ledger series, they will enjoy this story. This is a wonderful summer read. Unfortunately, I had already started reading this book before I realized that my library does not have anymore books in the series!
Profile Image for Elena Linville.
Author0 books92 followers
April 26, 2025
DNF at 30%

I can't suspend my disbelief enough to continue with this book.

How does a virus that is not airborne infect most of the US in a matter of days? Why is a CDC scientist, who we are told is smart and brilliant, behave like a hysterical teenager all the time? And more importantly, why does a team of special forces, who we are told are the best of the best, act like they share one braincell? Seriously, the amount of stupid behaviors in that team is unbelievable.

This is the second series by this author that I tried to read and bounced off. I don't think I will try another one.
Profile Image for LordTBR.
627 reviews151 followers
June 19, 2015
This is the first novel by Smith that I have read and will definitely not be the last. The book features a fast paced story line, enough blood and gore to scare off the squeamish, very credible science and characters that you just have to root for (though there are some you will come to hate). This is definitely not a zombie book, though the Variants do crave flesh and blood. Think of it as a cross between the rage induced humans in 28 Days Later mixed with the Plaga in Resident Evil, except they have a giant sucker with pointy teeth for a mouth. If you enjoy military/horror/sci-fi/medical mystery genre combos (I know, it's a cluster) or even just one of those genres, then you will love this book as much as I did. I can't recommend it enough and I look forward to reading Book 2, Extinction Edge!
Profile Image for Andy Jesse.
341 reviews2 followers
September 22, 2024
Ein Vorreiter eines Genres, auf dessen Hypetrain zwischenzeitlich etliche andere aufgesprungen sind. Zombieaction und Military Action vereinen sich zu einem hochspannenden und explosiven Cocktail.

Atempausen sucht man vergeblich. Patriotismus überraschenderweise ebenso. Klar spielt das Hauptaugenmerk in den Vereinigten Staaten. Ein kleines Team behält letztlich stets die Oberhand im Kampf gegen die Horden an Infizierten, aber nicht ohne heftig einzustecken und ordentlich dezimiert zu werden.

Die Hauptcharaktere Reed und Kate weckten im Laufe der Geschichte meine Sympathien. Wirkten aber nicht so überzeugend in Bezug auf ihre emotionalen Reaktionen, da sie nach einem solch krassen Vorfall viel zu schnell in den Profimodus zurück schalteten. Das galt hauptsächlich für die Wissenschaftlerin.

Warum ⭐️⭐️⭐️◾️◾️?

Eigentlich 3,5. Hochspannung. Toller Schreibstil. Krasse Action. Düsteres Szenario. Ein kleines Team holt die Kohlen gegen riesige Gegnerhorden aus dem Feuer. Hatte was von einem Videospiel auf Easymodus. Und die allzu unerschütterliche Kaltblütigkeit kaufe ich der sonst sympathischen Zivilistin Kate nicht ab. Dennoch freue ich mich aufgrund der hochspannenden Story auf die Fortsetzung
This entire review has been hidden because of spoilers.
Profile Image for Jammin Jenny.
1,509 reviews222 followers
February 12, 2020
I really enjoyed this sci-fi horror thriller. A new strain of the E-bola virus pops up - one that can keep mutating inside the body. So, it turns the people that get this virus into really fast running zombies. They can climb walls, climb ceilings and are really nasty. I do believe I will continue with this series and listen to the audiotapes. Brandon Pinchot narrates and does a really good job.
Profile Image for Michael Hicks.
Author38 books487 followers
November 1, 2015
[I received a complimentary copy of this novel from the author in exchange for an honest review.]

Reading a Nicholas Sansbury Smith novel is like watching an epic big-screen, end of the world action flick. The plot is high-concept, the story is visceral, and the heroes are nicely etched and worth rooting for. It's the sort of book that propels the reader forward with every page, and demands to be read in a single sitting because it's just so damn uncompromisingly addicting.

I came upon Smith's Orbs novels on NetGalley a few months back and pegged him as an author to watch out for. With his latest, Extinction Horizon, the first in a new series, he fully lives up to the promise exhibited in those earlier novels. And, dare I say, I think I like this book even more than its (entirely unrelated) predecessors.

Extinction Horizon is a real rip-roaring techno-thriller, and it hits all those delicious sweet spots that I tend to favor - there's a dose of credible-enough science and a team of scientists, working alongside well-trained US soldiers, to solve a nightmarish end-times scenario, and grisly, tense, rapid-fire action throughout. This is a James Rollins level of fun, and it's a genre I absolutely love. Smith's elevator pitch for the novel is The Hot Zone meets World War Z, and if it's certainly an apt description (and, frankly, if that doesn't grab your attention, I have no idea what will).

Given the recent over-reactions regarding the Ebola outbreak Stateside, this is also a very timely work. The plot revolves around modifying Ebola with another potent, top-secret viral weapon, to create an even deadlier pathogen. And, of course, that works out about as well as you would expect it to... The nasty bits start flying, and yada, yada, yada, there's a zombie-like outbreak tearing across the globe and destroying humanity. I really enjoyed Smith's take on the infected, and zombie is probably too simplistic a comparison. Think of something zombie-like crossed with a little bit of the flukeman from The X-Files, with incredible strength and reflexes. They're a legitimately gonzo, hostile threat.

Extinction Horizon is a white-knuckle thrill ride, filled with action and loads of suspense. I absolutely loved it, and cannot wait to see what comes next. Highly Recommended!
Profile Image for Shana Festa.
Author8 books144 followers
May 7, 2015
The other day I opened my Amazon page to my first book and BOOM--I see this book is a number 1 bestseller. Of course, I did what any author would do. I stalked Nick Smith on social media and demanded he share the secret to his success.

Unfortunately, there was no secret. So I bought the book, and figured it out. Want to know what the secret is?

The book is excellent! So that best selling rank is well deserved in my opinion. Great job Smith!

Now, I may be giving away my age here, but I was absolutely giddy to hear this narrated by Bronson Pinchot. The only thing that would have made it better could have been him sneaking in a "don't be ridiculous" at the end.

I'm a lover of the traditional, Romero shambler zombie. Smith's zombies are anything but. And you know what? I still loved them! As a healthcare professional, I enjoyed the moments of science. As a fan of the genre, I enjoyed everything else. Now if you'll excuse me, book two is waiting for me!
27 reviews2 followers
May 14, 2015
Ok - not Zombies but something along the lines.
We've got researchers looking for a cure and of course the Special Forces team protecting them or getting in dangerous situations, or both.

There is nothing quite new in this Story that i've havent read many times before, the characters never get any depth even the Military guys which are supposed to be "Special" have an "amateurish" touch.
There where so many situations where you ask yourself if those are the best of the best, no wonder that the world gets in such troubles.

The dialogues are flat and never got me to sympathise with the characters, sometimes they repeat themselves so you start skipping/skimming them later on.

I seldom write a review but as the author asked to do so in the afterword in a very Kind way - so here it is.

I wish him very well as I could not even write a story like that - but, hey, everyones a critic nowadays.

Profile Image for Dan Schultz.
7 reviews3 followers
August 16, 2015
The great thing about this book is that you can read one out of every fifty pages and trust that you will be told four more times what just happened.

The premise is unnecessarily over the top -- a virus that mutates people into super powered cannibalistic leeches and takes less than a minute to incubate. Two days to spread across the entire United States. There is simply no room for tension or any degree of interest.

Twist - (insert the only plot point here). Oh wait not a twist you told us that in the first chapter.

In fact, now that I think about it, every single concept in this book was already written in the first chapter.
Profile Image for Efka.
533 reviews312 followers
October 30, 2020
Nothing too fancy, but still a decent read if you just want to unwind and clear your head. No new grounbreaking ideas or something that would make you scream "awesome", but the pace is fast, writing is light and not demanding and there are not too much mistakes or discrepancies. All in all, a simple book that has just enough in it for me to read the next one in the series. A "golden standard", if you'd like it summarised in a nutshell. 3*.
Profile Image for Kris.
69 reviews
September 25, 2015
Aaaaand I'm back to running up the stairs from my scary basement
Profile Image for The Nerd Daily.
720 reviews388 followers
June 17, 2017
| Review by Salima Bensalah

Extinction Horizon is the explosive first instalment of the successful Extinction Cycle series, and focuses upon the spread of a deadly strain of the Ebola virus as it sweeps across the world. As the infection response rates quicken and there seems to be no way of controlling the virus, it is only a matter of time to find a cure or destroy the infected.

Smith’s novel takes an interesting turn from the over-saturated market of zombie-esque fiction and depicts an apocalyptic situation with the infected as rabid monsters with strange, enlarged lips and bloodshot eyes. In a frightening but clichéd twist, the virus is revealed early on to have been constructed as a biological question which has fallen out of control of the government, and now running rampage across national borders. Smith’s continual references of scientific jargon portray the intensive level of research he has used for this novel, presenting the infected less as monsters and more as victims. The backdrop of the Cold War as the foundations for the biological weapon certainly seems a plausible and terrifying explanation for the experimentation of such a virus.

The novel focuses around Master Sergeant Reed Beckham and his Delta Force Team, and their journey to gather whatever they can for Dr. Kate Lovato to help create a cure. There are plenty of apocalyptic clichés, some good, and some painful, but all of them work together to create a concoction of horror, suspense and sci-fi which will keep you on your toes! Ultimately, this wasn’t as much of a genre-twist as M. R. Carey’s The Girl With All the Gifts, but it kept the thrilling elements of Brooks� World War Z and introduced an array of characters and situations.

Smith’s writing style is particularly addictive, clinging onto details and drawing out catastrophe to epic proportions. However, only a handful of characters are developed enough to care about during climatic scenes of great tension, which will hopefully improve throughout the rest of the seven-book series, allowing us to develop an emotional connection when it really matters.

Overall, Extinction Horizon was certainly thrilling and explosive, cutting across time period and settings, although it lacked the emotional depth and clung to some tired clichés of the genre. The book provides a solid grip to the start of an intense, fast-paced series.
Profile Image for Amanda.
98 reviews33 followers
September 27, 2016
wow. this book was terrifying. there were many times where i couldn't put it down! I've already bought all the other books in this series, so I'll be reading the rest very soon
Profile Image for John.
764 reviews3 followers
January 14, 2020
My least favorite of his books so far. Not bad just a lot of repetition in elements of the story.
Profile Image for Karen.
1,272 reviews41 followers
December 28, 2014
I received this ARC from the author in exchange for an honest review.

First thing I have to say is that these are not zombies! They are infected individuals, there is a difference. I know it does not seem important but I am serious about my zombies. Secondly my true rating is 4.5 stars, and that is only because it started a bit slowly for me.

I have here an author who can write a great apocalypse and make me enjoy it as the world falls apart. The characters are realistically portrayed and feel like they could be someone you might meet in your everyday life or at least know someone who knew them. The science is easy to understand, which is good since it could get technical and bog the story down if not handled right. The disease vectors are well thought out, both for the natural and unnatural ones depicted. The descriptions of the infected did put me in the mind somewhat of those in the Will Smith movie 'I Am Legend' but I think it is more because they are fast and animal like. Once again, not a bad thing because I like them, as long as you don't call them zombies.

There have been more breakouts of the Ebola virus around the globe and it appears to be mutating making it harder to treat. Doctors from the CDC are being sent out and coming back with samples hoping to isolate the strain and be able to create a cure. During the Vietnam war there had been experiments with various drugs in an attempt to create better soldiers, those attempts were disastrous.

Now Delta Force operatives are being sent in to rescue or bring back the work of a scientist who has been experimenting with some dangerous virus's and has gotten into trouble. Master Sargent Reed Beckham and his team go in without a full understanding of the consequences and come away without the prize. Dr. Kate Lovato and her mentor are asked to help figure out what was done and find a cure, but once again they are not given all the facts. Can the world be saved when men decide to play god?

I could give a blow by blow but then there would be no need to read the book, and you really should read it. I kind of fell a little in love with Reed Beckham because he seemed so needy in a way, even though he is a strong man who can take care of himself and others. This seems to escalate pretty quickly and I like that we are taken through it day by day which gives a better measure of how swiftly things get out of control.

I cried a little, laughed a little, yelled at the stupid and the slow, was truly disturbed by some of things done by the infected, and generally had a blast. This is the start, I hope, of a new world of survivors. Enjoy this immediately!

Profile Image for Empress Reece (Hooked on Books).
915 reviews81 followers
May 30, 2016
Just recently I read "Hell Divers," also by Nicholas Sansbury Smith and it was beyond fantastic! I'm seriously still thinking about that book today. I loved it so much I was determined to buy and read everything else the author has ever written, then lo and behold the next day, I received this awesome email from the author himself generously offering to gift this series to me if I was interested in reading & reviewing it. I was not only pleasantly surprised and ecstatic but I was thinking damn, this is a man after my own heart. Not only is he a fabulous writer but he can read my mind too! Needless to say, I told him of course I'm interested, so he graciously gifted me the books and here we are. *Just to be clear, my review is totally my own and is in no way influenced by my outside communication with the author...

What happens when a variant strain of Ebola starts turning man into flesh seeking, deranged monsters aka Variants? Absolute chaos! A military ghost team and a team of scientists are doing everything they can to contain and stop the virus but the virus is spreading so fast that the only realistic outcome is extinction of the human race! Can they figure out how to eradicate the Variants before the Variants eradicate the entire human race?

From the moment I started listening to the story the action was in full force and didn't let up until the very end which is exactly what I was in the mood for. I especially appreciated the level of technical detail and complexity that went into the virus and Variants plot. It was completely realistic and 100% believable. The author also has a knack for developing characters that you want to read more about and ultimately form an attachment with. I did have deja vu a couple times though. I felt like there was some redundancy in several areas of the plot. That's the main reason I went with a 4.5 star rating. All-in-all though, this was a very solid start to the series and I'm looking forward to continuing the action in book two, Extinction Edge.

*I received a copy of this book from the author in exchange for an honest review. Thanks Nick!


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