Codeword Overlord: Axis Espionage and the D-Day Landings

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

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

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

MI6: British Secret Intelligence Service Operations, 1909–1945

Historical Dictionary of World War II Intelligence

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

GCHQ: The Secret Wireless War, 1900–1986

The A to Z of British Intelligence

At Her Majestys Secret Service: The Chiefs of Britains Intelligence Service, MI6

Historical Dictionary of Cold War 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

Cold War Counterfeit Spies: Tales of Espionage; Genuine or Bogus?

Spycraft Secrets: An Espionage A-Z

Double Cross in Cairo: The True Story of the Spy Who Turned the Tide of War in the Middle East

The A to Z of Sexspionage

Historical Dictionary of Sexspionage