NEW YORK TIMES BESTSELLER • He strikes without warning. He kills without mercy. He's only just begun.

As part of an elite K-9 search and rescue team, Sarah Patrick and her golden retriever, Monty, have a gift for finding what no one else can. But their latest assignment is not like the others. This time Sarah is being forced to take part in a deadly mission . . . by a man who knows enough about her past to ensure her cooperation.

Billionaire John Logan's top-secret venture has been sabotaged, its facilities destroyed, and its handpicked staff massacred. The sole survivor is being held for ransom. Logan knows that the only way to save the man—and the secrets he holds—is to find him as soon as possible.

Sarah is furious when she is strong-armed into joining Logan on his search. And once she takes the perilous assignment, not even Logan's promises that she and Monty will be safe may be enough to protect them. Because a killer is devising a sadistic vengeance . . . and he may soon find use for Sarah.