Traces the sophisticated D-Day operation through which extraordinary spies deceived the Nazis about the location of the Allied attack, profiling the successful Double Cross System and the remarkable individuals who used the program to save thousands of lives.

"The New York Times bestselling author of The Spy and the Traitor tells the thrilling true story of the most important female spy in history: an agent code-named "Sonya," who set the stage for the Cold War. In 1942, in a quiet village in the leafy English Cotswolds, a thin, elegant woman lived in a small cottage with her three children and her husband, who worked as a machinist nearby. Ursula Burton was friendly but reserved, and spoke English with...