Check out this great link for free audio books, textbooks, and eBooks! http://librarianchick.pbwiki.com/ You can search for free books on the site at http://librarianchick.pbwiki.com/BookSearch

Check out the list of ''20+ Places for Public Domain E-Books'' at http://mashable.com/2007/11/12/public-domain-ebook-sources/. The links are for LEGAL e-book sites. The comments on that page also suggest a few more e-book sites. Enjoy!