The Sleeper Protocol

Dr. Mara Sutton, a top FBI hostage negotiator with a perfect record, faces her most dangerous challenge yet when a series of incidents suggests the existence of a clandestine mind-control program known as Project Threshold. As Mara investigates, she uncovers a network of sleeper agents programmed to respond to specific triggers embedded in everyday communications.

But the deeper she digs, the more she realizes that the program never truly ended, and that its architects are now using its tec...