Open directories are unvetted. While most are just personal backups or enthusiast collections, downloading files from unknown servers carries a risk of malware. Always use an updated antivirus and scan files before opening them.
The gold standard for public domain classics. index of ebooks epub parent directory top
These directories are often temporary. Known as "ODs" in the community, they frequently go offline or become password-protected once they receive too much traffic. Better Alternatives for Free Ebooks Open directories are unvetted
A massive (though controversial) shadow library used heavily by students and researchers. The gold standard for public domain classics
A project of the Internet Archive that allows you to "borrow" digital copies of books. Conclusion
If you prefer a safer and more legal route, several massive repositories offer millions of EPUBs for free:
This is a phrase found on almost every open web server. Including it helps filter out blog posts about ebooks and focuses on actual file repositories.
