The sentinel : a Jack Reacher novel / Lee Child and Andrew Child

Series numeration from www.goodreads.com

"It is close to midnight on a Saturday night when Jack Reacher gets off a bus at the Greyhound station in Nashville. Reacher is in no hurry. He has no appointments to keep. No people to see. No scores to settle. Not yet anyway. But in the early morning hours, under particular circumstances, a familiar thought will be snaking through his sharp, instinctual lizard brain: A voice in his head telling him to walk away. Of course, this wouldn't be the first time he listened to his gut instead. Meanwhile, seventy-five miles south and west of Music City is a sleepy little town where a recently-fired guy nurses a grudge that will fester into fury--and a desire for payback. But who is watching him, standing guard over a long-buried secret, ready to strike before it can be revealed? If you don't have a sense of the danger you're in, then it's best to have Reacher"--

When Reacher ends up in a town near Pleasantville, Tennessee, there's nothing pleasant about the place. When he spots someone walking into an ambush, the odds are four against one-- until Reacher intervenes, with his own trademark brand of conflict resolution. The man he saves is Rusty Rutherford, an unassuming IT manager, recently fired after a cyberattack locked up the town's data, records, information... and secrets. Rutherford wants to stay put, look innocent, and clear his name. But the guys who jumped Rutherford are part of something deadly. Now Reacher is involved in conspiracy, a cover-up, and murder-- all centered on a mousy little guy in a coffee-stained shirt who has no idea what he's up against. -- adapted from jacket