Subject
History
112
Animals
22
African Americans
19
Intermediate nonfiction
17
Miscellanea
14
Politics and government
14
Women
13
Conservation
11
Social aspects
11
Social life and customs
11
Dogs
10
Infancy
10
Social conditions
10
Wildlife conservation
10
Animal behavior
9
Civil rights
9
Climatic changes
9
Marine animals
9
Presidents
9
Ecology
8
English language
8
Race relations
8
Rare mammals
8
Alphabet
7
Authorship
7
Behavior
7
Birds
7
Ocean
7
Prevention
7
Space flight to the moon
7
Alphabet books
6
Astronauts
6
Conduct of life
6
Curiosities and wonders
6
Environmental aspects
6
Environmental protection
6
Environmentalism
6
History and criticism
6
Holidays
6
Indians of North America
6
Insects
6
LEGO toys
6
Political activity
6
Protest movements
6
Search and rescue operations
6
Travel
6
Treatment
6
Video games
6
Vocational guidance
6
Astronomy
5
more ...