Other free book resources

CK-12 is another place where books are able to be self publishable and an open source educational book repository.

Curriki - Fooling With Words Website is another place where open source books are available for education.

Lulu is also a place where books that have been made by authors allowing for a free copy of the book in PDF.

Did you all know about Wikibooks?

Wikibooks is really cool. It has books available for free. These books can be downloaded as a PDF for free and then they can be placed on the Kindle for free reading material. Yeah!!! Free!!!! If you want a bound copy you can create a PDF that can be uploaded to Lulu.com and then purchased as a bound book. IF YOU DO THAT, make sure you are verifying the specs before you create the book. You may need to adjust the PDF document.

They also have Wikijunior for children's books. This is a section of free educational books for children birth to 12 years old.