Darwin Holmstrom has written, co-written, or contributed to more than thirty books on subjects ranging from motorcycles and muscle cars to Gibson Les Paul guitars, including Indian Motorcycles, GTO: Fifty Years, Let's Ride: Sonny Barger's Guide to Motorcyclying, Top Muscle: The Rarest Cars from America's Fastest Decade, BMW Motorcycles, The Life Harley-Davidson, and The Complete Idiot's Guide to Motorcycles. Darwin is a former senior editor at Motorbooks and former Midwestern editor for Motorcyclist magazine.