Soon to be the subject of a series adaptation from the producers of Killing Eve Brilliant visceral writing with terrific pace, this book grips you like a vice from the very first line and never lets you go PETER JAMES Someone is watching. At each abandoned crime scene theres a hidden clue: a tiny metal cog. Someone is sending Detective Sam Berger a message, someone who knows that only he will understand the cryptic trail. Someone knows. When another teenage girl disappears without trace, Sam must convince his superiors that theyre dealing with a serial killer. As the police continue the hunt to find the latest victim, Sam is forced to unearth long-buried personal demons. He has no choice if he is to understand the killers message before time runs out. Somebody is killing just for him.