Codeword Overlord: Axis Espionage and the D-Day Landings

Hitler's Nest of Vipers: The Rise Of The Abwehr

Hitler's Nest of Vipers: The Rise Of The Abwehr

MI6: British Secret Intelligence Service Operations, 1909–1945

Hitler's Trojan Horse: The Fall of the Abwehr, 1943–1945

Historical Dictionary of World War II Intelligence

Historical Dictionary of World War II Intelligence

Mask: MI5's Penetration of the Communist Party of Great Britain

The A to Z of British Intelligence

The A to Z of British Intelligence

Historical Dictionary of Cold War Intelligence

Historical Dictionary of Cold War Intelligence

Historical Dictionary of World War I Intelligence

Historical Dictionary of Signals Intelligence

Historical Dictionary of World War I Intelligence

Historical Dictionary of Signals Intelligence

Cold War Spymaster: The Legacy of Guy Liddell, Deputy Director of MI5

Historical Dictionary of Cold War Counterintelligence

Historical Dictionary of Cold War Counterintelligence

Spycraft Secrets: An Espionage A-Z