- Textbook Revolution: Find biology, business, engineering, mathematics and world history textbooks here.
- Wikibooks: From cookbooks to the computing department, find instructional and educational materials here.
- KnowThis Free Online Textbooks: Get directed to stats textbooks and more.
- Online Medical Textbooks: Find books about plastic surgery, anatomy and more here.
- Online Science and Math Textbooks: Access biochemistry, chemistry, aeronautics, medical manuals and other textbooks here.
- MIT Open Courseware Supplemental Resources: Find free videos, textbooks and more on the subjects of mechanical engineering, mathematics, chemistry and more.
- Flat World Knowledge: This innovative site has created an open college textbooks platform that will launch in January 2009.
- Free Business Textbooks: Find free books to go along with accounting, economics and other business classes.
- Light and Matter: Here you can access open source physics textbooks.
- eMedicine: This project from WebMD is continuously updated and has articles and references on surgery, pediatrics and more.
Math and Science
- byGosh: Find free illustrated children’s books and stories here.
- Munseys: Munseys has nearly 2,000 children’s titles, plus books about religion, biographies and more.
- International Children’s Digital Library: Find award-winning books and search by categories like age group, make believe books, true books or picture books.
- Lookybook: Access children’s picture books here.
Philosophy and Religion
- Bored.com: Bored.com has music ebooks, cooking ebooks, and over 150 philosophy titles and over 1,000 religion titles.
- Ideology.us: Here you’ll find works by Rene Descartes, Sigmund Freud, Karl Marx, David Hume and others.
- Free Books on Yoga, Religion and Philosophy: Recent uploads to this site include Practical Lessons in Yoga and Philosophy of Dreams.
- The Sociology of Religion: Read this book by Max Weber, here.
- Religion eBooks: Read books about the Bible, Christian books, and more.
- ReadBookOnline.net: Here you can read plays by Chekhov, Thomas Hardy, Ben Jonson, Shakespeare, Edgar Allan Poe and others.
- Plays: Read Pygmalion, Uncle Vanya or The Playboy of the Western World here.
- The Complete Works of William Shakespeare: MIT has made available all of Shakespeare’s comedies, tragedies, and histories.
- Plays Online: This site catalogs “all the plays [they] know about that are available in full text versions online for free.”
- ProPlay: This site has children’s plays, comedies, dramas and musicals.
Modern Fiction, Fantasy and Romance
History and Culture
- LibriVox: LibriVox has a good selection of historical fiction.
- The Perseus Project: Tufts’ Perseus Digital Library features titles from Ancient Rome and Greece, published in English and original languages.
- Access Genealogy: Find literature about Native American history, the Scotch-Irish immigration in the 19th and 20th centuries, and more.
- Free History Books: This collection features U.S. history books, including works by Paul Jennings, Sarah Morgan Dawson, Josiah Quincy and others.
- Most Popular History Books: Free titles include Seven Days and Seven Nights by Alexander Szegedy and Autobiography of a Female Slave by Martha G. Browne.
Arts and Entertainment
- Books-On-Line: This large collection includes movie scripts, newer works, cookbooks and more.
- Chest of Books: This site has a wide range of free books, including gardening and cooking books, home improvement books, craft and hobby books, art books and more.
- Free e-Books: Find titles related to beauty and fashion, games, health, drama and more.
- 2020ok: Categories here include art, graphic design, performing arts, ethnic and national, careers, business and a lot more.
- Free Art Books: Find artist books and art books in PDF format here.
- Free Web design books: OnlineComputerBooks.com directs you to free web design books.
- Free Music Books: Find sheet music, lyrics and books about music here.
- Free Fashion Books: Costume and fashion books are linked to the Google Books page.
Here you can find mystery books from Sherlock Holmes to more contemporary authors.
- MysteryNet: Read free short mystery stories on this site.
- TopMystery.com: Read books by Edgar Allan Poe, Sir Arthur Conan Doyle, GK Chesterton and other mystery writers here.
- Mystery Books: Read books by Sue Grafton and others.
- The Literature Network: This site features forums, a copy of The King James Bible, and over 3,000 short stories and poems.
- Poetry: This list includes “The Raven,” “O Captain! My Captain!” and “The Ballad of Bonnie and Clyde.”
- Poem Hunter: Find free poems, lyrics and quotations on this site.
- Famous Poetry Online: Read limericks, love poetry, and poems by Robert Browning, Emily Dickinson, John Donne, Lord Byron and others.
- Google Poetry: Google Books has a large selection of poetry, fromThe Canterbury Tales to Beowulf to Walt Whitman.
- QuotesandPoem.com: Read poems by Maya Angelou, William Blake, Sylvia Plath and more.
- CompleteClassics.com: Rudyard Kipling, Allen Ginsberg and Alfred Lord Tennyson are all featured here.
- PinkPoem.com: On this site, you can download free poetry ebooks.
- Banned Books: Here you can follow links of banned books to their full text online.
- World eBook Library: This monstrous collection includes classics, encyclopedias, children’s books and a lot more.
- DailyLit: DailyLit has everything from Moby Dick to the more recent phenomenon, Skinny Bitch.
- A Celebration of Women Writers: The University of Pennsylvania’s page for women writers includes Newbery winners.
- Free Online Novels: These novels are fully online and range from romance to religious fiction to historical fiction.
- ManyBooks.net: Download mysteries and other books for your iPhone or eBook reader here.
- Authorama: Books here are pulled from Google Books and more. You’ll find history books, novels and more.
- Prize-winning books online: Use this directory to connect to full-text copies of Newbery winners, Nobel Prize winners and Pulitzer winners.