I have had a number of faculty ask about the Open Educational Resource (OER) textbook I am using for my history classes. The text is called U.S. History, by P. Scott Corbett, Volker Janssen, and John M. Lund. It is published by OpenStax.
I provide the text in the course as a PDF file. The text is available online in an ADA compliant version for free as well. If the students want a traditional textbook, they can order it from the OpenStax store on Amazon here: http://amzn.to/2mcoJCc.
Other posts on Open Educational Resources.