Creative Commons-licensed copies of all the books which were available online from a specific publisher at the end of 2012.
Here are some examples of the many OER textbooks available for economics. Search for others in the repositories linked on the left, or contact a librarian to help you find what you want.
Van Wylen Library LibGuide on Open Educational Resources (OER) is a derivative/remix of Northwestern Michigan College (NMC) Library Research Guide on Open Educational Resources (OER) by NMC Librarians.and Eastern Michigan University's Textbook Alternatives Library Research Guide by Kate Pittsley-Sousa.