Tripwire is a book in the 'Jack Reacher' series by Lee Child.  Jack Reacher is an ex military cop who has chosen the life of a ghost, even since he was 'let go' from the army. Tripwire sees him doing what he likes best: leading the life of an anonymous drifter when he encounters Costello, a private detective, looking for Reacher on behalf of a mysterious Mrs Jacobs.  Not wanting to lose his anonymity, Reacher refuses to identify himself. Within a couple of hours though, two 'enforcers' come to bar where he's working as a bouncer, also looking for him.  After an altercation, the enforcers beat a retreat.  Reacher, who goes after them comes across a dead body: of Costello.  Why was the man looking for him in the first place and why did he get killed?

Following the backtrail, Reacher finds the mysterious Mrs. Jacobs: Jodie, daughter of Leon Garber, Reacher's former commanding officer.  By the time he traces Judie, Leon has sustained a fatal heart attack.  Reacher uncovers that Leon was trying to help an old couple to find news about their only son who had gone 'Missing in Action' in Vietnam. Was there something sinister about the missing Victor Hobies? Were the deaths of Costello and his secretary related to it or had Leon unearthed something bigger? These are the questions Jack Reacher sets out to find answers for, even as he has to stave off attempts on his and Judie's lives while combating military red-tape and information classified beyond his access.

Title: Tripwire
Author: Lee Child
Genre: Thriller

My Scores:
Suspense: 8/10
Character Sketches: 9/10
Background Research and Authenticity: 8/10
Overall Enjoyability: 8.5/10
Total Score: 8.4/10