1. The Online Books Page
The University of Pennsylvania’s Online Books Page is one of the best places to read free books online. There are more than 30,000 English works available. All of them are formatted nicely and can be read right on your computer.
2. Project Gutenberg
Project Gutenberg is the original producer of free electronic books. There are currently more than 25,000 books in the site’s online catalog and 100,000 more titles available from Gutenberg’s many partners and affiliates.
Questia is probably best known as a resource for students and writers, but the site also hosts an outstanding library with more than 5,000 free books that can be read online. Offerings include classics and rare books.
4. Classic Book Library
This free online library stocks the world’s most treasured classics. Books are sorted by genre–children’s literature, romance, mystery, science fiction and historical fiction–and include the writings of authors like L. Frank Baum and Jane Austen.
FullBooks.com offers thousands of unabridged books that can be read for free online. All of the books are sorted by title. FullBooks.com also includes links to sites that have free reference books, science books and biographies.