E-books, or electronic books, are versions of a book you can read online. Some of these books can be printed or downloaded, often a limited number of pages at a time.
Internet Public Library Reading Room Links to free e-books, most published 75 or more years ago
Online Books Page Links to 25,000 free e-books on the Web, courtesy of the University of Pennsylvania
Project Gutenberg The original e-book site
containing over 17,000 titles, most published 75 or more years ago
Hathi Trust Digital Library
Internet Archive Archive of digital texts, audio, moving images, and webpages