Where can I find free online textbooks?

Yo. I'm trying to my HW for 2 important classes (both honors)but need the textbooks. Since I obviosly don't want to spend like 60 dollars for each of them I was wondering if there was any website, I don't care if it's illegal, that has free online Prentice Hall textbooks for biology or geometryWhere can I find free online textbooks?
There are many sites which offer free and legal textbooks/journals.



http://www.textbookrevolution.org/

http://www.freetextbooks.eu/

http://ut7.in/sandbox/ncert_textbooks/

http://la-press.com/

http://oerwiki.iiep-unesco.org/index.php鈥?/a>



Of course, you can download textbooks illegally from torrent/warez sites, but I won't recommend that. It'd be better to buy second-hand textbooks -- they won't cost you much.



There are many sites which help you find second hand textbooks -- just seach for your country + second hand textbooks (e.g. Australia second hand textbooks). Here's one of them: http://www.books4exchange.com/

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