Tempting the Enemy by Dee Tonorio
Detective Pale Rysin is a werewolf, the leader of his pack. Jade-Scarlett is a member of the powerful order of the Sibile (women with strange magical powers), but she is also half-wolf. When she is sent to help Detective Rysin investigate the murders of several young women, sparks fly...in more than one way.
There is an instant attraction between the two, but their worlds have been taught to hate each other for years. Will they be able to overcome their prejudices and work together to solve the murders, or will their differences and desires to work alone hinder them leading to only more grisly deaths.
I loved this book. The characters were forced to evolve as they learned more about each other and the history that taught them to hate. The interactions between them a perfect and drive the story forward even as the events around them shape who they are becoming.