Digital textbooks are in the news these days. Many publishers are providing digital textbooks at a cost. However, Boundless has "just launched the public beta version of its brand new site. What is Boundless? It’s a way to easily turn all of the open source information that exists in the world into a simple easy-to-use digital textbook. And it’s free."
Boundless uses open source materials to create their digital textbooks. Additional digital resources are also generated. For more information on how it works check out this article, or go directly to the Boundless website to sign up: http://www.boundless.com/.
Via Beth Dichter