Free Kindle Books: A Guide

The following are among the free Kindle book providers: Project Gutenburg, Google E-Bookstore, Internet Archive, Open Library, Manybooks.net, and LibriVox.

1. Project Gutenberg: 33,000 free e-books, including all of the classics, available in Kindle, HTML and simple text formats.
   
   
2. Google E-Bookstore: The free section is filled with thousands of free, scanned copies of books, available in Kindle-friendly PDF formats.
   
   
3. Internet Archive: Millions of primarily rare, out-of-print works in multiple languages and formats (including Kindle), especially useful for academic work.
   
   
4. Open Library: 20 million user-contributed items in multiple editions and formats (including Kindle).
   
   
5. ManyBooks.net: Nearly 30,000 titles, many of which have been pulled from Project Gutenberg. Has a good collection of little-known Creative Commons works.
   
   
6. LibriVox: Thousands of free audiobooks.

More Kindle resources can be found from this guide.