Two Secret Service agents, one of them retired, have each had similar experiences losing presidential candidates while assigned to protect them. As the two discredited agents enter a maze of lies, secrets, and deadly coincidences, they uncover a shocking truth: that the separate acts of violence that shattered their lives were really a long time in the making --and are a long way from over.

Two ex-Secret Service agents must face a dark world of violence, codes, and spies at a secret CIA training camp in this #1 New York Times bestseller about a mystery that could destroy the nation.
Near Washington, D.C., there are two clandestine institutions: the world's most unusual laboratory and a secret CIA training camp. Drawn to these sites by a murder, ex-Secret Service agent Sean King encounters a dark world of mathematicians,...

After alleged serial killer Edgar Roy is apprehended and locked away in a psychiatric unit, private investigators Sean King and Michelle Maxwell are called in by Roy's lawyer--an old friend of Sean King--to look into the case. But en route to their first meeting with the lawyer, King and Maxwell discover his dead body.