Two distinctive killers, two detectives with distinctly different styles--Thorne and Tanner again end up joining forces in the new thriller from internationally bestselling author Mark Billingham From "one of the most consistently entertaining, insightful crime writers working today" (Gillian Flynn), The Killing Habit again brings together favorite wild-card detective Tom Thorne and straight-laced DI Nicola Tanner on a pair of lethally high-stakes cases. While DI Nicola Tanner investigates the deadly spread of a dangerous new drug, Tom Thorne is handed a case that he doesn't take too seriously, until a spate of animal killings points to the work of a serial killer. When the two cases come together in a way that neither could have foreseen, both Thorne and Tanner must risk everything to catch two very different killers.