Agent Sonya

This book tells the story of Ursula Kuczynski, code-named 'Sonya', a high-ranking Soviet intelligence officer who lived a double life in the English Cotswolds during World War II. With access to her diaries and correspondence, Ben Macintyre reveals her role in gathering scientific secrets that enabled the Soviet Union to build the atomic bomb.

Sonya's career spanned decades, evading capture by the Chinese, Japanese, Nazis, MI5, MI6, and the FBI, and her story reflects the ideological clashes of the 20th century between Communism, Fascism, and Western democracy.