Bibliomania — peruse online literature for classic texts, study guides, and reference materials

Calibre — manage all of your e-books and formats (download required)

DigiLibraries — offers free ebooks

Feedbooks — discover thousands of public domain books

Free Classic Audiobooks — discover public domain audiobooks

Google Books – Advanced Search — find millions of great books you can preview or read for free

Hathi Trust — offers a collection of millions of titles digitized from libraries around the world

Internet Archive — offers free universal access to books, movies & music, as well as billions of archived web pages

Librivox — access public domain audiobooks

National Academy Press — publishes more than 200 books a year on a wide range of topics in science, engineering, and health

Open Library — access thousands of library records freely available including numerous full-text and primary sources. Check “Show only ebooks” to see the materials that are available online. In the search results, the books with the book icon next to the title are the ones that are available to read online.

Open Source Shakespeare — includes the 1864 Globe Edition of the complete works

Perseus Digital Library — makes available many materials and texts from time periods throughout history

Project Gutenberg — offers public domain e-books and audiobooks

Read Print — download thousands of books free

The Online Books Page — facilitates access to books that are freely readable over the Internet

Wikibooks — peruse open-content textbook collections that anyone can edit