Tripwire

Tripwire is the third book in the Jack Reacher series written by Lee Child. It was published in 1999 by Putnam in America and Bantam in the United Kingdom. It is written in the third person. In the novel, retired military police officer Jack Reacher becomes embroiled in a mystery involving a Vietnam War veteran who was reported missing in action, but who has resurfaced as a vicious loanshark with a secret he will murder to protect.