Secret service World War, 1939-1945 118 History 110 Spies 38 Intelligence service 37 Espionage 28 Military intelligence 24 more ... Spy stories 16 Politics and government 15 Underground movements 14 Intelligence officers 13 Suspense fiction 13 Women spies 13 Biography 11 Cold War 11 World War, 1914-1918 11 Campaigns 10 Terrorism 9 Cryptography 8 Foreign relations 8 Espionage, Soviet 7 Espionage, British 6 Internal security 6 Deception 5 Dillon, Sean (Fictitious character) 5 Police 5 Presidents 5 Prevention 5 Underground movements, War 5 British 4 Espionage, German 4 National security 4 Personal narratives, American 4 Personal narratives, British 4 Politics and Government 4 Social conditions 4 Undercover operations 4 Women intelligence officers 4 Adventure fiction 3 Assassination 3 Assassins 3 Atomic bomb 3 Electronic intelligence 3 Espionage, American 3 Ferguson, Charles (Fictitious character) 3 Fiction 3 Participation, Female 3 Protection 3 Relations 3 Service secret 3 Smiley, George (Fictitious character) 3 Vietnam War, 1961-1975 3 Women 3 20th century history: c 1900 to c 2000 2 Adventure stories 2 Allon, Gabriel (Fictitious character) 2 American military assistance 2 Anti-Nazi movement 2 Arms race 2 Art restorers 2 Collaborationists 2 Conspiracy 2 Crime 2 Crisis management in government 2 Defectors 2 Democratization 2 Diplomatic history 2 Espionage, Russian 2 Espionnage 2 FICTION 2 Female 2 Generals 2 Historical 2 Historical fiction 2 Humorous 2 Invasions 2 Johnson, Blake (Fictitious character) 2 Large type books 2 Mafia 2 Military assistance, American 2 Military campaigns 2 Military participation 2 Moles (Spies) 2 Mothers and daughters 2 Nazis 2 Officials and employees 2 Officiers de renseignements 2 Operation Freshman, 1942 2 Participation, American 2 Peacekeeping forces 2 Police & security services 2 Political corruption 2 Political crimes and offenses 2 Propaganda 2 Propaganda, British 2 Revenge 2 Scientists 2 Secret Service 2 Service des renseignements 2 Short Stories (single author) 2 less ...