Operation Garbo: The Personal Story of the Most Successful Spy of World War II

He was GARBO to the Allies and ALARIC to the Germans – the most successful double agent of the Second World War. Indeed, his spy network across Britain was so highly regarded that he was decorated for his achievements … by both sides.

Throughout the war, GARBO kept the Germans supplied with reports from his ring of twenty-four agents. Hitler's spymasters never discovered or even suspected a double-cross, but all the agents in GARBO's network existed solely in his imagination.

In one of the ...