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.
Robert N. Pripps has authored and co-authored dozens of farm tractor books, including Classic Farm Tractors, Vintage Ford Tractors, Big Book of Caterpillar, Big Book of Massey, and more. Pripps lives near Park Falls, Wisconsin, where he owns a maple syrup