History 69 Spies 36 Espionage, British 31 Secret service 27 Espionage 23 Espionage, Soviet 20 Foreign relations 17 more ... World War, 1939-1945 17 History and criticism 14 Espionage in literature 11 Intelligence service 10 Politics and literature 10 Spy stories, English 10 Spies in literature 8 English fiction 6 Espionage, German 6 Women spies 5 Electronic surveillance 4 In literature 4 Political and social views 4 Politics and government 4 Spy stories, American 4 Conspiracies 3 Criticism and interpretation 3 Espionage, American 3 Literature and society 3 Underground movements 3 American fiction 2 Anxiety in literature 2 Attempted assassination 2 less ...