I enjoyed the development of the overall story line and think a bad guy has been set up for the future. (view spoiler)[ Although I'm not really sure why they didn't just green-eye him into behaving, so you have to bite him first, so what? He's an ass and Tate should be running the unit (hide spoiler)] I liked that Ian, Spade and Denise were included with Cat and Bones and hope to see more of them in the future books. 
 I mentioned in my review of book 5 that I felt like it was sort of a transition, and I felt like this installment was more of a full story moving in the chosen direction. Can't wait for the short out in November in The Bite Before Christmas and Once Burned!