Admiral Canaris was head of German military intelligence from 1935 to 1944; he was killed in the latter year by the Gestapo for disloyalty to the Nazi régime, though he did not belong to the band of conspirators that actively sought to eliminate Hitler. Since the Admiral's diaries were destroyed, this sympathetic account of his career by one of his collaborators rests largely, at least for the later period, on published sources. The original German edition appeared as "Canaris: Patriot und Weltbürger" (Stuttgart: Union Deutsche Verlagsgesellschaft).