Spies 111 History 72 Secret service 33 Espionage, Soviet 28 World War, 1939-1945 15 Espionage 13 Intelligence service 13 more ... Intelligence officers 12 Cold War 11 Officials and employees 10 Women spies 9 Foreign relations 8 Espionage, German 7 Communists 6 Espionage, British 6 International relations 6 Communism 5 Journalists 5 Politics and government 5 Soldiers 5 Assassination 4 Biography 4 Gay men 4 Military intelligence 4 Relations 4 Subversive activities 4 Art historians 3 Chemists 3 Espionage, American 3 Participation, Female 3 less ...