The book is split into three stories, in which Anton gets caught up in trying to protect a young woman and a boy, either or both of whom may have extraordinary magical powers. In the process he finds out more than he'd like to about the lines his bosses are willing to cross in order to do what they see as ultimate good. It's a well-realised universe, with clear rules set up only for them to be broken soon enough. Despite being told from the perspective of the "good guys," there's more than a little suggestion that the straightforward self-interest of the Dark Ones may be more honourable than the underhandedness and manipulation used by the Light Ones.
The first two stories are well-paced and gripping; the third one is slower, being more of a buildup to the rest of the trilogy, but it does work towards a pretty exciting conclusion. Recommended, and I'm looking forward to reading the next two books.