e-book
- Cambridge University Press – https://www.cambridge.org/core/what-we-publish/open-access#
- Directory of Open Access Books – https://www.doabooks.org/
- e-PGPathshala – https://epgp.inflibnet.ac.in/
- Librivox – https://librivox.org/
- Oxford Open – https://academic.oup.com/journals/pages/open_access