I liked this book quite a bit, devouring it in two days. I did not feel that the Kirby chapters had the same importance or urgency as the other points of view until the very end--they did help me to care about her as a character, but they felt draggy and tedious at times (especially the scenes that serve only to deepen her relationship with Dan--I would have found it more interesting if they had stayed completely platonic, especially given the lack of a father figure in her life). Kirby can be summed up as a more likable version of the protagonist in Dark Places.
My other quibble is that the author peppered the book with Britishisms and I don't understand why her editor didn't take those out. What do editors do, exactly, if they don't fix this kind of stuff? I can overlook the occasional "got" instead of "gotten," but when Dan repeatedly referred to people as "punters" in his head I had to roll my eyes. Come on!
Still, this was a fun and interesting read.