Non-Fiction:

• Alex Catalogue of Electronic Texts
• Bartleby's Reference section and Non-fiction section
• Bibliomania   In addition to fiction, this site contains classic reference books, biographies, and non-fiction.
• BookRags
• Chest of Books   Provides a list by subject.
• ebooks @ Adelaide.edu  Search by author, title, subject, or within the complete texts.
• Google Books
• Hypertexts: Electronic Texts for the Study of American Culture
• HippoCampus   Orgainzed by subject area and includes non-fiction books and textbooks in math, science, and social studies.
• Internet Archive eBook and Texts Archive
• Internet History sourcebooks project   Has texts on ancient, medieval, and modern history.
• Making of America Books   Contains over 10,000 materials on American History. Use the search box or click on "subject browsing."
• Open Library  Over one million free ebooks to choose from.
• UPenn's Online Books Page
• World Public Library

Classic Literature:

• Alex Catalogue of Electronic Texts
• Bartleby's Fiction section and Verse section
• Bibliomania   Over 2,000 classic works of fiction, poetry, and drama plus study resources.
• BookRags
• Classic Reader  Lists books by author.
• Classics at the Online Literature Library  Listed by author.
• ebooks @ Adelaide.edu  Search by author, title, subject, or within the complete texts.
• International Children's Digital Library
• The Literature Network
• The Literature Page
• Planet eBook and Planet PDF
• Public Literature.org   Lists titles in both text and audio.
• Project Gutenberg  Has both classic literature and non-fiction.
• Short Story Index   Listed by author.

Audio Books:

• AudioBooks by Verkaro.org   A small collection of classic literature novels.
• AudioBooksForFree.com
• Audiobooks.org   Some are fee-based, many are free.
• Books Should Be Free   Audio version of public domain books.
• Free Classic Audiobooks.com
• LearnOutLoud.com  Over 3,000 free audio books, lectures, speeches, sermons, interviews, and more. Most can be downloaded as MP3 and most videos stream online.
• LibriVox   Audio recordings of books in the public domain.
• Librophile  Lists both audio books and eBooks - click on "Free" in the top menu bar.
• Lit2Go   A free online collection of stories and poems in .mp3 format.
• LoudLit   A small collection of classic lit and poetry on audio.
• Open Culture Free Audio Books   List of fiction, non-fiction, and poetry.
• Project Gutenberg audio book list books read by a person.
• Project Gutenberg audio book list books read by a computer voice.
• ThoughtAudio.com   Classic literature titles on audio.
• Voices in the Dark  Books in all genres.

Search Engines for Finding Online Books:

• Digital Book Index   Free registration required.
• eBookSearchr
• Google Books Advanced Book Search
• Just Free Books   Searches over 700 web sites.
• Search eBooks  A search engine for online books all over the web.