Directory of open access books (DOAB), also sorted by topic.
OAPEN Library OA books, mainly humanities and social sciences.
OpenEdition brings together four platforms dedicated to electronic resources in the humanities and social sciences.
Monographs mainly in social sciences and humanities. Information for authors.
JSTOR - more than 9,000 open access books.
Books are made open access on MUSE through a variety of funding initiatives, including Knowledge Unlatched, NEH Humanities Open Book grants, TOME, and individual publisher programs.