In one book, author Ben Wynne has managed to combine two of the South’s great loves — history and music. The University of North Georgia professor recently released his third book, “In Tune,” which serves as a nonfiction examination of the musical inspirations and careers of two legendary Southern artists, Charley Patton and Jimmie Rodgers. Specifically, the book deals with a time when music was one of the only areas of Southern life that rose above racial boundaries.