Obsidian butterfly

Anita Blake travels to New Mexico to repay a debt to Edward, a ruthless hitman who specializes in hunting supernatural threats. In the desert heat of Santa Fe, they face a series of ritualistic murders that suggest a power far older and more dangerous than the vampires they usually track. Anita must navigate a world of ancient Aztec magic while deciding how much of her own humanity she is willing to lose to help a friend.