FreeTechBooks.com is a directory of free computer science books and lecture notes, all of which are legally and freely available for download (
free as in beer). From the site:
What's the Catch?
None. All the books listed here are available for free, as they are hosted on websites that belong to the authors or the publishers. You are most welcome to view, download and print the books for your own private use at no charge.
These authors publish their books for free to give you a chance to review their books, to get as much good information distributed as possible. So, if you like what you read online, you can always support the authors by buying the paperback at your local or online bookstores.
A quick check of the site revealed that several free books are offered in Adobe PDF, PostScript, and HTML formats. If you're looking for some free technical reference material in electronic format, give FreeTechBooks.com a look.
[via
Lifehacker]