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.