Phil in SF reviewed Deep Down by Lee Child
Reacher's assignment is to find the mole
3 stars
Someone is leaking specs for a new sniper rifle. Because of a highly contrived setup, the Army has to call Reacher in to wine and dine the 4 female suspects without them knowing he's undercover. A prequel story set before Reacher leaves the Army and becomes the drifter that moves through most of the books.