Randy Leffingwell wrote his first book, American Muscle, in 1989 while still on staff at the Los Angeles Times. Since then, he has authored another 47 titles for Motorbooks and its sister publisher Voyageur Press, including Porsche 911 50 Years, Corvette 60 Years, and The Art of the Corvette. Leffingwell is considered one of the top Porsche historians working today, and he enjoys a close working relationship with Porsche AG. He lives in southern California, about 100 miles north of Los Angeles.
David Newhardt is one of the best automobile photographers working today and has provided photography for best-selling Motorbooks titles Muscle: America's Legendary Performance Cars, Corvette: Fifty Years, Mustang: Forty Years, Mopar Muscle: Fifty Years, and Shelby Mustang: Racer for the Street.