In this extraordinary, pulse-pounding DEBUT, Saul Black takes us deep into the mind of a psychopath, and into the troubled heart of the woman determined to stop him. When the two strangers turn up at Rowena Cooper's isolated Colorado farmhouse, she knows instantly that it's the end of everything. For the two haunted and driven men, on the other hand, it's just another stop on a long and bloody journey. And they still have many miles to go, and victims to sacrifice, before their work is done. For San Francisco homicide detective Valerie Hart, their trail of victims has brought her from obsession to the edge of physical and psychological destruction.