- Spies[remove]30
- Espionage7
- Espionage, Soviet7
- Defectors3
- World War, 1939-19453
- Espionage, British2
- Intelligence service2
- Art historians1
- Blunt, Anthony, 1907-19831
- Communism1
- Communist strategy1
- Counterrevolutions1
- Dansey, Claude Edward Marjoribanks, Sir, 1876-19471
- Gay men1
- Guerrilla warfare1
- Hambleton, Hugh1
- Jews1
- Nuclear physicists1
- Philby, Kim, 1912-1
- Secret service1