Project Gutenberg
An archive of public domain books available in a variety of formats including plain text, PDF, HTML and EPUB. Books can be searched by author or title. An RSS feed is available for tracking site additions. An online and offline catalog is included.
Google Books
A listing of books and magazines that is searchable by topic or through a search bar. Books can be arranged in bookshelves. Not all material available through Google Books is free. Copyright restrictions are such that only parts of some books are available.
Open Library
Books are available to read online, borrow (in eBook format), or purchase. Open Library is searchable by subject, author, or through a search bar. Classic literature titles are available for free in eBook format.
UC Press E-Books Collection, 1982-2004
Contains almost 2,000 books from academic presses on a range of topics. All books are available to University of California students and staff, and over 500 titles are available to the public. Books can be browsed by author, title, or subject, or a search bar can be used.
Alex Catalogue of Electronic Texts
A collection of public domain documents with a focus on American and English literature and Western Philosophy. Books are searchable through a search bar or can be browsed by author, title, or tag.
Bartleby.com
Online source for reference, poetry, fiction and nonfiction. Reference works contained include Bartlett’s Familiar Quotations, Gray’s Anatomy, World Factbook, and Strunk’s Elements of Style. Titles can be searched by those categories and indexes are provided by author, subject, and title.
Bibliomania.com
Site includes over 2,000 free classics as well as reference books, biographies, and research works.
International Children's Digital Library
A multicultural, multilingual digital collection of children's literature from around the world.
University of Michigan Historical Mathematics Collection
A growing library of books selected from the University of Michigan mathematics collection that have been digitized to improve access and to preserve the content of these books. All of the books in this collection were published in the 19th or early 20th century.
Science Books Online
Free science e-books, textbooks, lecture notes, monographs, and other science related documents. All texts are available for free reading online, or for downloading in various formats.
Internet Archive Ebook and Texts Archive
"The Internet Archive Text Archive contains a wide range of fiction, popular books, children's books, historical texts and academic books."