Barnes and Noble
Choose from thousands of free eBooks in the Nook Store or borrow books from your friends and family (all eligible books will have a "LendMe" icon next to them).
File Formats: NOOKBook. You can download a free app to read Nook files on your iPad, iPhone, Android, PC, Mac or Blackberry
Borders
Sift through over one million free title to find something that interests you.
File Formats: Mobile, ePub
Amazon
Download classics like The Adventures of Serlock Holmes and Pride and Prejudice for free. The Kindle Store has a large library of out-of-copyright books.
File Formats: Kindle. You can download a free app to read Kindle files on your Mac, PC, iPod, iPhone, Blackberry, Android or Windows Phone
Your Local Library
Prefer to read new-release books? Check to see if your library has an eBook collection that you can tap.
File Formats: Varies
Project Gutenberg
This site was cataloging free eBooks long before eBooks were a big deal. All 33,000 titles are in the public domain.
File Formats: ePub, Kindle, HTML and text
Manybooks.net
Get all the copyright-free books that you'll find on other sites, plus new books that have been published under a Creative Commons agreement.
File Formats: ePub, Kindle, HTML and almost two dozen others
