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.

David Newhardt has been a photographer for Motor Trend, authored 17 automotive books, and supplied images to scores of other books and magazines. As chief photographer at Mecum Auctions, David continues to photograph and write about everything automotive. He is a graduate of Southern Illinois University, and he served eight years on nuclear submarines. Born and raised in Chicago, he currently lives near Nashville, Tennessee.