Good suggestion, Mike. Univ. of Illinois Press puts out so many great books on roots music and its history.
I just got my copy of the Dubois book, but it will have to wait until I finish Karen Linn's That Half-Barbaric Twang. http://www.press.uillinois.edu/books...252064333.html A great read so far. Also on loan from my library, Gura and Bollman's America's Instrument: The Banjo in the Nineteenth Century.