Werewolf Cop by Andrew Klavan, 2015
From Edgar Award-winning and New York Times bestselling author Andrew Klavan, a supernatural thriller about a good cop in the grips of an evil curse. In the tradition of Dexter and The Shield, the first in a riveting trilogy about a crime-fighter on a quest to control the beast within.
Zach Adams is one of the best detectives in the country. Nicknamed Cowboy, he’s a soft-spoken homicide detective from Houston known for his integrity and courage under fire. He serves on a federal task force that has a single mission: to hunt down Dominic Abend, a European gangster who has taken over the American underworld.