History 24 Juvenile literature 21 Muslim converts 19 Biography 13 Leadership 11 Vocational guidance 11 Islam 9 Management 8 Politics and government 8 Foreign relations 7 Terrorism 7 English language 6 World War, 1939-1945 6 Great Britain 4 International organizations 4 Problems, exercises, etc 4 Success in business 4 Analog-to-digital converters 3 Dinosaur 3 France 3 Grammar 3 Handbooks, manuals, etc 3 Internet (Computer network) 3 Interpersonal communication 3 Interpersonal relations 3 Marketing 3 Methods 3 Muslim convert 3 Muslim converts from Christianity 3 Occupations 3