Genre
Electronic books
198
Encyclopedias
72
Biography
39
Dictionaries
31
Sources
15
Chronology
10
Miscellanea
5
Handbooks, manuals, etc
4
Maps
4
Cases
2
Cross-cultural studies
2
Anecdotes
1
Databases
1
Gazetteers
1
Juvenile literature
1
Outlines, syllabi, etc
1
Platforms
1
Quotations, maxims, etc
1
Textbooks
1