I'm never sure whether to start with what I liked or what I didn't like about a book. I really liked this book, and I thought the second half was much stronger than the first half. I got tired of being reminded by the narrator that he used to be a cop in Boston for the first third of the book, and that a good half of the book kept throwing in his motivation (Diana) as an afterthought. All sorts of things would happen in a chapter, and then, oh yeah, I am worried about Diana and hope I get to go looking for her. But once Diana came back into the picture, it was solid. The motivation was real, and the experiences mostly felt honest. All-in-all, I thought it was a solid espionage thriller, but average for the genre based on my comments above. Sadly, and not the author's fault, but the copy editor(s) did a terrible job, and there were many mistakes that went into the printing.