Tripwire (Jack Reacher Book 3)

Jack Reacher hunts the hunter in the third novel in Lee Child’s New York Times bestselling series.
Ex military policeman Jack Reacher is enjoying the lazy anonymity of Key West when a stranger shows up asking for him. He’s got a lot of questions. Reacher does too, especially after the guy turns up dead. The answers lead Reacher on a cold trail back to New York, to the tenuous confidence of an alluring woman, and the dangerous corners of his own past.