Stephen Coonts’ Deep Black: Conspiracy

Called in to investigate the purported suicide of a Secret Service agent, Charlie Dean, the Deep Black team, and Desk Three, a covert branch of the NSA, examine links between that death, an assassination attempt on a presidential candidate, and threats that lead back to Vietnam, to Charlie's past, and to a long-thought-dead enemy targeting the U.S. with an insidious conspiracy. Original.