My guest Dennis McNally will join me on Coastal Airwaves  August 21st, 4:00 pm. Streaming at KWMR.org, 89.9 Bolinas , 90.5 PRS, 92.3 the Valley. He is an author, historian, and music publicist formerly for the Grateful Dead. His books include On Highway 61: Music, Race and the Evolution of Cultural Freedom, A Long Strange Trip: The Inside…