John Lutz: Serial (USA 2011)

From the Publisher:
She was gagged. Violated. Tortured. Nailing the killer is priority number one and only the best will do -- that means Frank Quinn. And Quinn wouldn't want it any other way. Because he recognizes the victim. Years ago, as a homicide detective, he saved her young life. Now the hunt is on, and deep in his gut, Quinn welcomes it. He knows he's seeing the work of a truly twisted serial killer. Except it's not the ritual weapon that makes this killer so disturbing. It's who he kills -- and how he makes them suffer...

John Lutz: Serial. A Frank Quinn Novel. Pinnacle Books, ISBN: 9780786020270 (July, 2011), 500 p., $7.99, eBook $5.99.