Box, C. J. Joe Pickett novel.

Nate Romanowski always knew trouble was coming out of his past. Now it's here, and it's coming for his friend Joe Pickett. In 1999, Nate was in a secret special forces unit in Central Asia when a colleague did something terrible. Now the man has incentive to eliminate anyone who knows about it, and Nate can guess exactly how he'll do it when it comes to his case - by striking at Nate's friends to draw him out. The entire Pickett family will be a target, and the only way to fight back will be outside the law