If you think the only way you could get free books is visiting your neighborhood library, think again. You could probably get most of your reading needs online without spending a dime. Here is websites you probably should look before your next purchase.
HippoCampus: HippoCampus is a free, public website for high school and lower-division College Students that offers NROC (National Repository of Online Courses) content indexed to popular textbooks.
Project Gutenberg: No list of open couseware projects would be complete without mention of this site. No matter which course you delve into, Project Gutenberg may have materials for you to use. There are, after all, over 27,000 free books available at this site and over 100,000 titles available at their partner, afilliate and resource sites.
Textbook Revolution: This is a student-run volunteer site that began in response to the textbook industry’s constant drive to maximize profits rather than educational value. To that end, you can gain access to numerous textbook materials online for your own private education.
The Assayer: The Assayer is the web’s largest catalog of books whose authors have made them available for free.
The Global Text Project: Do you need a textbook? Perhaps you can find it here online through this open content project. The goal is to make textbooks available to the many who cannot afford them. Or, to make them free to the many who want to read them all!
WikiBooks: Wikibooks is a Wikimedia community for creating a free library of educational textbooks that anyone can edit. Browse through a fantastic range of categories to build your online library.
LibriVox provides free audiobooks from the public domain. There are several options for listening. The first step is to get the mp3 or ogg files into your own computer.
Scribd: Scribd is a social publishing site, where tens of millions of people share original writings and documents. Scribd’s vision is to liberate the written word.
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The library has plenty of free books online as well.