Tripwire

Reacher's anonymity in Florida is shattered by an investigator who's come looking for him. But hours after his arrival, the stranger is murdered. Retracing the PI's trail back to New York, Reacher's compelled to find out who was looking for him and why. He never expected the reasons to be so personal--and twisted.
Jack Reacher, the hulking ex-soldier readers will remember from Child's first two thrillers, Die Trying and Killing Floor, can kill with his bare hands, and sports chest muscles thick enough to stop bullets. He's actually a dynamo of a character, wily in an innocent sort of way, and the anchor to one of the best new series in thriller fiction. Here, Reacher is incognito, living the life of a drifter and digging swimming pools in Key West. When a PI from New York comes looking for him, and shortly afterwards turns up dead with his fingertips sliced off, Reacher flies north and discovers that the instigator of the search is Leon Garber, his former army commanding officer. But Garber has died the day before Reacher arrives. As Reacher finds out from Jodie Jacob, Garner's beautiful attorney daughter, Garber was helping an elderly couple to locate their son, who supposedly died in a helicopter crash during the Vietnam War. The military won't confirm the death, however, or even classify the soldier as missing in action. Pursuing the search together, Reacher and Jacob narrowly escape murder attempts by a pair of dark-suited thugs who work for an evil corporate loan shark named “Hook” Hobie, who has a hideously disfigured face and a metal hook for a right hand. Hobie is harboring a terrible secret linking him to the couple's vanished son, and he'll kill anyone who tries to discover his diabolical past.