Open Book PublishersA collection of textbooks published under Creative Commons licensing -- most are free to use in PDF and HTML format. Subjects include: Anthropology, Archaeology and Religion, Art and Music, Cinema and Photography, Classics Textbooks, Digital Humanities, Economics, Politics and Sociology, Education, Environmental Studies, Health, History and Biography, History of the Book, History of Science, International Relations, Law, Literature, Language and Culture, Mathematics, Media Studies and Journalism, Open Field Guides, Philosophy, Sciences, Theatre, Women and Gender Studies.