Secret War
Subtitle: Spies, Ciphers, and Guerrillas, 1939-1945
Publisher: HarperCollins Publishers Limited; William Collins
Published: 2015
Language: eng
ISBN-13: 9780007503919
Subjects: World war, 1939-1945, underground movements; World war, 1939-1945, cryptography; World war, 1939-1945, secret service; Great britain, history, 20th century; Intelligence service; Espionage