The secret of SOE's code war revealed for the first time... 'As a comedy about the British at war, Leo Marks's book ranks with the fiction of Anthony Powell and Evelyn Waugh ...

As a cryptographer driven to improve the security of secret codes for Britain's Special Operations Executive (SOE) during World War II, Marks used wit and tenacity to find ...

A World War II cryptographer chronicles his career in the Special Operations Executive, discussing his replacement of outmoded codes with one-time silk-printed codes.

In 1942, Leo Marks left his father's famous bookshop, 84 Charing Cross Road, and went off to fight the war. He was twenty-two. Soon recognized as a cryptographer of genius, he ...