The A to Z of Sexspionage

Secret War: The Story of SOE, Britain's Wartime Sabotage Organisation

MI5: British Security Service Operations, 1909–1945: The True Story of the Most Secret counter-espionage Organisation in the World

Historical Dictionary of Naval Intelligence

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

MI6: British Secret Intelligence Service Operations, 1909–1945

Historical Dictionary of Signals Intelligence

Historical Dictionary of Cold War Counterintelligence

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

GCHQ: The Secret Wireless War, 1900–1986

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

Codeword Overlord: Axis Espionage and the D-Day Landings

Spies Who Changed History: The Greatest Spies & Agents of the 20th Century

Historical Dictionary of Sexspionage

Historical Dictionary of British Intelligence: Edition 2

Encyclopedia of Political Assassinations

Spies Who Changed History: The Greatest Spies & Agents of the 20th Century

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