Fair Game By Patrica Briggs. My review.

This is the 3rd book in the Alpha and Omega series.  It takes place a few years after the second book.  Charles is having a few problems and Anna is really feeling the strain.  Their Alpha sends them to help the FBI to find a killer who is praying on fae and werewolves.  If you like stories about werewolves, vampires, fae, and witches I would recommend this series to you.  Actually I would recommend any book by her.  Patrica Briggs in my opinion is a talented author and I can't wait to read more by her.