http://en.wikibooks.org/wiki/Main_Page http://en.wikibooks.org/wiki/Main_Page I'm not sure what the quality of the books are overall, or the consistency betwee

http://en.wikibooks.org/wiki/Main_Page http://en.wikibooks.org/wiki/Main_Page I'm not sure what the quality of the books are overall, or the consistency between books, but I've had some luck with introductory level info. It looks like a good start and seems to be the same basic concept as what you describe.