A series of brutal murders darkens the Wrightsburg, Virginia countryside. The killer, replicating notorious murders of the past, seeks to improve them, while taunting the police by leaving watches on the victims set to the hour corresponding with their position on his hit list. The tension is further increased by a second killer who is copying the crimes of the first.

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,...