•           Academic theses
•           Animals
•           Anthologies about an author or a topic
•           Art and photography
•           Authorized or public domain translations
•           Autobiography
•           Adventures
•           Biographies
•           Business and investment
•           Careers, professions, and leadership
•           Child rearing and adolescence
•           Children’s books
•           Cokking, nutrition and wine
•           Companies and institutions
•           Computers and the Internet
•           Crafts
•           Cultures
•           Dictionaries and reference books
•           Diets to lose weight
•           Engineering
•           Exercise
•           Family, genealogy
•           Finances
•           Gardening
•           Health and beauty
•           History
•           Hobbies (stamp collecting, coin collecting, model airplanes, etc.)
•           Home
•           How things work
•           Humor
•           Law
•           Learning a language
•           Math, physics, chemistry, etc.
•           Medicine
•           Meditation
•           Mystery and detectives
•           Narratives
•           Nature
•           New editions of older works
•           Novels
•           Philosophy
•           Poetry
•           Politics
•           Professional/technical
•           Public domain books
•           Real crimes
•           Religion, spirituality
•           Repairs
•           Romance
•           Science
•           Science fiction and fantasy
•           Sex
•           Short stories
•           Social behavior
•           Song lyrics
•           Sports
•           Travel