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

CUCKOO'S EGG

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

Sandworm: A New Era of Cyberwar and the Hunt for the Kremlin's Most Dangerous Hackers

Historical Dictionary of British Intelligence: Edition 2

R.A.W. Hitman: The Real Story of Agent Lima

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

The Mitrokhin Archive: The KGB in Europe and the West

Historical Dictionary of International Intelligence: Edition 2

The Billion Dollar Spy: A True Story of Cold War Espionage and Betrayal

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

Historical Dictionary of Cold War Intelligence

Operation Mincemeat: The True Spy Story that Changed the Course of World War II

The A to Z of British Intelligence

The Snowden Files: The Inside Story of the World's Most Wanted Man

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

Good Cop, Bad War

MI6: British Secret Intelligence Service Operations, 1909–1945

The Illegals: Russia's Most Audacious Spies and Their Century-Long Mission to Infiltrate the West