The sequel to 'Night Watch,' presented in a similar format - three separate stories that together form an arc.
While 'Night Watch' shows the perspective of the traditional 'good guys,' the stories in 'Day Watch' are from the point of view of the 'Dark Ones,' which means that they're a bit less sympathetic (lots of self-centeredness, the attitude that the end justifies the means, and oh yeah, sometimes murder and atrocities are just part of a day's work.)
Unauthorized Personnel Permitted
A witch who has overextended herself in a magical action temporarily loses her powers. When this happens to Alisa, the head of the Dark Ones, Zabulon, sends her to recuperate while posing as a camp counselor - she can suck energy from the happy (or, rather, homesick and nightmare-prone) young campers. However, without access to her magic, she finds herself unexpectedly falling for a handsome co-worker at the summer camp - hardly typical for a Dark witch.
A Stranger Among Others
A man finds himself on a train - with no memory of who he is, just a huge bag full of cash - and a weird compulsion to take certain actions. Who is he? Is someone controlling him, and if so, which side? Matters are complicated when this cipher seems to have unprecedentedly powerful magic.
The Dark Ones jockey over control of a powerful artifact which has been stolen from its guardians, and could well throw off the balance between Dark and Light. The Inquisition will have to get involved.
As with the previous book, I found the strength of this book to be in its vivid Russian setting, and the depiction of the culture.