A matter of trust

Cold War Spymaster

At Her Majesty's Secret Service

Historical Dictionary Of World War I Intelligence

Historical Dictionary of British Intelligence (Historical Dictionaries of Intelligence and Counterintelligence Book 0)

Snow

TRIPLEX

Mortal Crimes: The Greatest Theft in History

The Guy Liddell Diaries, Vol. II

Historical Dictionary of British Intelligence (Historical Dictionaries of Intelligence and Counterintelligence, No. 1)

Venona