While ebooks are now outselling hardbacks 2:1 you can get lots of free ebooks online. Here’s a list of the top free book websites.
1) gutenberg.org – download over 33,000 free ebooks to read on your PC, iPad, Kindle, Sony Reader, iPhone, Android or other portable device – and the competitor manybooks.net
2) booksinmyphone.com – read ebooks on your mobile phone
3) worldlibrary.net – shelves more than 750,000+ PDF eBooks in 100+ languages
4) freecomputerbooks.com – links to thousands of free IT books and manuals, free computer, mathematics, technical books and lecture notes
5) mangafox.com – read hundreds of foreign comic books (with English translations)