In A Man Called Intrepid, William Stevenson chronicled the World War II exploits of British superspy Sir William Stephenson, and here he considers whether Intrepid's wartime aide, Dick Ellis, had been both a Soviet mole and a Nazi spy. Revisiting Intrepid's last wartime case, this history introduces Soviet intelligence defector Igor Gouzenko, whom Intrepid saved by finding him sanctuary inside a Canadian spy school. Gouzenko was about to make more devastating disclosures than those concerning atomic espionage when the case was mysteriously terminated and Intrepid's organization dissolved. Unraveling the implications of this twist in the story, Stevenson sheds light on a highly classified secret of the Cold War.