The Cold War made for strange partners -- including the CIA and a well-known magician named John Mulholland. In 1953, Mulholland was hired by the C.I.A. to adapt his craft for its agents. The documents he produced, long thought destroyed, were discovered in 2007 by two C.I.A. historians, who have recently published "The Official C.I.A. Manual of Trickery and Deception."