OSU Free Books Online

Seeing the flooding in Ohio featured on NBC news this morning reminded me of the interesting reference website I found at the The Ohio State University Press. Its Open Access Initiative makes over 70 books available for download in .PDF format. The site claims:

All titles available this way, whether old or new, have gone through the exact same peer review process as our printed books. Any book that carries our imprint--no matter what medium is being used--has been approved by our Editorial Board after a thorough vetting process.

The collection spans the gamut of subjects. I'm not sayin' that this is necessarily a place to start research (although you could), but it is a resource to check for a free copy of a primary reference.