PDF Books for free

[EmmaNelson]

Over 4,000 educational books are now available for free download in PDF format. Just browse NAP.edu, click on a book, the price of a hard copy of the book is shown just above a "download free PDF" button.

http://notes.nap.edu/2011/06/02/mor...ress-pdfs-now-available-to-download-for-free/

 

[JTsyo]

If you're into sci-fi BAEN has a free library.