Open Textbook Library
growing catalog of free, peer-reviewed, and openly-licensed textbooks by the Center for Open Education and the Open Textbook Network.
OpenStax College
open source textbooks that meet standard scope and sequence requirements written by professional educational content developers with a rigorous peer review process
OER Commons
50,000+ high quality OERs including textbooks by ISKME and endorsed by SCTCS with a community and technical college level search option
MERLOT
more than 40,000 peer-reviewed OERs including textbooks are in this collaborative collection by international education institutions and systems
Milne Open Textbooks
a catalog of open textbooks authored and peer-reviewed by SUNY faculty and staff
BC Campus OpenEd
textbooks aligned with the province's top 40 highest-enrolled subject areas including trades and skills training
Wikibooks
open-content textbooks collection that anyone can contribute to including academic instructors and professionals
EBSCO Open Access Collection
search filter applied to database of open access eBooks by EBSCO