If you are the one who loves science fiction books then head over to Tor.com to find some e books for free download. There are 24 e-books and high resolution wall papers available for download.
The books are in PDF, HTML, HTML Zip and Mobi format, pick your format and download. Wallpapers are available in various desktop resolutions and some of them even have an iPhone format. The free e-books are available until Sunday July 27 so grab them before Sunday.
Download from Freebies Bonanza page CNet