Some free books links - the is projectgutenberg.com

http://www.apress.com/free/index.html

www.techbooksforfree.com/ --- programming books for free

free-books.org

audiobooksforfree.com

http://onlinebooks.library.upenn.edu/webbin/book/browse?type=author&key=B

literalsystems.org

projectgutenberg.com

gutenberg.org - all books whose copyright has expired

not free books - itune store and audible.com

http://www.gutenberg.org/dirs/