I tried Openverse and Europeana. Some of these appear to categorize eBooks as "images", or perhaps they are just promotional images for unfree books. Tens of thousands of results.
Here's a Google Books search. I was unable to find a "search for license" type thing, but you can search for "Fully viewable" or "Google eBooks only":
My classmates at school ate this stuff up when I volunteered that there are sites where you can find awesome public domain reference material that's often better-quality than the paywalled stuff you pay for.
Don't forget the Open Textbooks and freely licensed academic materials. Community colleges and universities will direct you to those.
Don't forget niche uses and special interests. Want to overcome your addiction to porn? Download some free eBooks: https://www.covenanteyes.com/e-books/
Here's the Creative Commons Search portal: https://search.creativecommons.org/
I tried Openverse and Europeana. Some of these appear to categorize eBooks as "images", or perhaps they are just promotional images for unfree books. Tens of thousands of results.
Here's a Google Books search. I was unable to find a "search for license" type thing, but you can search for "Fully viewable" or "Google eBooks only":
https://www.google.com/search?tbo=p&tbm=bks&q=-copyright&tbs...
My father loves HathiTrust, and so do many other people who love freedom: https://www.hathitrust.org/
Of course you know the Internet Archive and Open Library: https://openlibrary.org/
Wikisource hosts lots of freely-licensed text, in many, many languages; here's English: https://en.wikisource.org/wiki/Main_Page
Never forget the O.G. PD site, Project Gutenberg: https://www.gutenberg.org/
Also, while it is not the written word, it is based on awesome freely-available books, and perhaps you could consider adding to the library at LibriVox: https://librivox.org/search?primary_key=0&search_category=au...
My classmates at school ate this stuff up when I volunteered that there are sites where you can find awesome public domain reference material that's often better-quality than the paywalled stuff you pay for.
Don't forget the Open Textbooks and freely licensed academic materials. Community colleges and universities will direct you to those.
https://oercommons.org/hubs/open-textbooks https://open.umn.edu/opentextbooks
Don't forget niche uses and special interests. Want to overcome your addiction to porn? Download some free eBooks: https://www.covenanteyes.com/e-books/