Obsidian Butterfly ~ Laurell Hamilton

This is the ninth novel in the Anita Blake series. In this novel Anita has to repay Edward for having killed his backup in a previous novel (The Killing Dance). He calls Anita and tells her he needs her to come to Santa Fe and help with the case he is working on. Anita arrives in New Mexico, and visits the crime scenes, and starts investigating, as well as meeting a couple more of Edwards associates. Anita also meets the local Master of the City, an Aztec goddess.