If you want quality eBooks or rentals check out ecampus.com.

To be free and open, the material must be freely redistributable. I should be able to take a copy, add some materials, make some changes, and give you the new version without restriction.

The textbooks in the Flat World Knowledge catalog are under a Creative Commons BY-NC-SA license. The ‘NC’ means non-commercial — the content may not be distributed as part of a commercial transaction. The lack of such a restriction on free and open source software is one of the reasons it is so successful.

Anyone who makes additions to the textbooks does the work for Flat World Knowledge without being able to freely choose how they redistribute the new work. Sadly, this is not free and open content.

Contrast this with Wikibooks (http://wikibooks.org), which are under the free and open GNU FDL. In fact, Flat World Knowledge is freely allowed to take any and all material from Wikibooks, modify it as they see fit, and release it as part of their commercial offering. They may not, however, make the subsequent work less free by making it e.g. non-commercially redistributable.

Karsten Wades last blog post..Two reasons to read the Mentor Summit wiki

News Todays last blog post..NEW YORK DOLLS Putting Finishing Touches On New Album Recordings