USED: A Tapping at My Door

A chilling serial killer thriller where the hunter becomes the hunted. When a mutilated body surfaces in Liverpool's suburbs, DS Nathan Cody—a detective still haunted by a catastrophic undercover operation—finds himself investigating a case with no conventional leads. A dead bird and missing eyes mark the killer's signature. As murders escalate, Cody uncovers a terrifying truth: the police themselves are the target. From the bestselling author of Cry Baby, this gripping psychological thriller explores the dark psychology of vengeance and the cost of obsession.