The Double Agent is a 1966 spythriller novel by the British writer John Bingham. It features the fictional head of British intelligence Ducane, who recurs in several of the author's novels. It was a runner-up for the Gold Dagger award.
References
Bibliography
Reilly, John M. Twentieth Century Crime & Mystery Writers. Springer, 2015.
West, Nigel. The A to Z of British Intelligence. Scarecrow Press, 2009.