As I understand it the Omnibus only collects the first five installments which got published as independent short stories originally (although only one of them is actually self-contained, the rest build on one another).
The story is fairly closed by that, or at least the main characters arc is brought to a more or less satisfying end, however, for the whole story you need to read the further two (?) books.
This edition seems to contain the whole series: /book/show/2...
The story is fairly closed by that, or at least the main characters arc is brought to a more or less satisfying end, however, for the whole story you need to read the further two (?) books.
This edition seems to contain the whole series:
/book/show/2...