History 84 Fiction 70 Biography 43 Politics and government 31 Social life and customs 17 Social conditions 14 Foreign relations 13 World War, 1939-1945 12 Description and travel 11 Education 10 Religion 9 Economic conditions 8 Science 8 Science fiction, American 8 Campaigns 7 History and criticism 7 Philosophy 7 Afro-Americans 6 Civilization 6 Executives 6 African Americans 5 Biology 5 Case studies 5 Industrial management 5 Juvenile literature 5 Motion pictures 5 Police 5 Presidents 5 Cooking 4 Correspondence 4