The Open Library

The Open Library is a collection of more than one million free ebook titles. The collection is cataloged by a community ov volunteer online librarians. 

The ebooks in the Open Library can be read online, downloaded to your computer, read on Kindle and other ereader devices and embedded into other sites. Some of the ebooks can also be listened to. 

(Source The Open Library).

Visit:

https://openlibrary.org/

About The Open Library (How it works)

https://openlibrary.org/help/faq/about