Gordon Thomas, a leading expert on the intelligence community, returns in Secret Wars to provide the definitive history of the famed MI5 and MI6.

Thomas's wide-sweeping history of two of the oldest and most powerful agencies in the world chronicles a century of both triumphs and failures. He recounts the roles that British intelligence played in the Allied victory in World War II; the postwar treachery of Great Britain's own agents; the defection of Soviet agents and the intricate process of "handling" them; the cooperation between the British and Americans in the search for...