Persuader : a Jack Reacher novel
(Book)

Jack Reacher. The ultimate loner. An elite ex-military cop who left the service years ago, he's moved from place to place--without family--without possessions--without commitments. And without fear. Which is good, because trouble--big, violent, complicated trouble--finds Reacher wherever he goes. And when trouble finds him, Reacher does not quit, not once--not ever. But some unfinished business has now found Reacher. And Reacher is a man who hates unfinished business. Ten years ago, a key investigation went sour and someone got away with murder. Now a chance encounter brings it all back. Now Reacher sees his one last shot. Some would call it vengeance. Some would call it redemption. Reacher would call it--justice. Jack Reacher takes an undercover assignment to investigate the disappearance of a federal agent from the home of a notorious drug dealer, but Reacher soon discovers that the dealer has ties to a man from Reacher's own past.