Perfect Prey is the second of a series surrounding DI Luc Callanach and DI Ava Turner. A wonderful police procedural with absolutely shocking serial killings, this is the perfect thriller to get you turning pages as fast as you can. The crimes in this book are dark and twisted and I could not stop reading. I am also a giant fan of DI Callanach and his character. These books are great as a series but could be stand-alones if you were looking to test them out. I highly recommend reading them in order though, to get a feel for the relationships and the other team members.