Bone Crossed (Mercy Thompson #4)

By day, Mercy is a car mechanic in the sprawling Tri-Cities of Eastern Washington. By night, she explores her preternatural side. As a shapeshifter with some unique talents, Mercy has often found herself having to maintain a tenuous harmony between the human and the not so human. This time she may get more than she bargained for.

Marsilia, the local Vampire Queen, has learned that Mercy crossed her by slaying a member of her clan—and she's out for blood. But since Mercy is protected from direct reprisal by the werewolf pack (and her close relationship with its sexy Alpha), it won't be Mercy's blood Marsilia is after.

It'll be her friends'.