Start with CNet's advice on free books for Kindle or Nook: http://howto.cnet.com/8301-11310_39-20087714-285/how-to-get-free-books-for-your-kindle-or-nook/ Amazon, of course, has a site for free Kindle books: http://www.amazon.com/Totally-Free-kindle-Books/lm/R27UG52OAM3TFX And Barnes & Noble has one for its Nook, too: http://www.barnesandnoble.com/u/Free-eBooks/379003078/ This site, now four years old, also lists many excellent sources of free and low-cost books: http://mashable.com/2007/11/12/public-domain-ebook-sources/