Like an investigator combing through the wreckage after a plane crash, Bosch searches for the "black box," the one piece of evidence that will pull the case together.

At the same time, a new love affair with a female cop begins to blossom for Bosch - until a stunningly blown mission leaves him in more trouble than ever before in his turbulent career. The investigation races to a shocking conclusion and leaves Bosch on the brink of an unimaginable decision.

Soon Harry's making some very dangerous connections, starting with a dead cop and leading to a bloody string of murders that wind from Hollywood Boulevard to the back alleys south of the border. Now this battle-scarred veteran will find himself in the centre of a complex and deadly game - one in which he may be the next and likeliest victim.

Cover your arse.

Regent's Park's First Desk, Claude Whelan, is learning this the hard way. Tasked with protecting a beleaguered prime minister, he's facing attack from all directions himself: from the showboating MP who orchestrated the Brexit vote, and now has his sights set on Number Ten; from the showboat's wife, a tabloid columnist, who's crucifying Whelan in print; and especially from his own deputy, Lady Di Taverner, who's alert for Claude's every stumble.

Meanwhile, the country's being rocked by an apparently random string of terror attacks, and someone's trying to kill Roddy Ho.

Over at Slough House, the crew are struggling with personal problems: repressed grief, various addictions, retail paralysis, and the nagging suspicion that their newest colleague is a psychopath. But collectively, they're about to rediscover their greatest strength - that of making a bad situation much, much worse.

It's a good job Jackson Lamb knows the rules. Because those things aren't going to break themselves.