The late Don Macmillan was one of the world's most respected authorities on Deere & Company. He bought his first Deere tractor in 1943, was appointed the first Deere dealer in the United Kingdom in 1958, and went on to establish one of the world's foremost collections of Deere tractors and memorabilia. Working with Deere & Company, he authored John Deere Tractors & Equipment Volumes 1 and 2 and John Deere Tractors Worldwide, all published by the American Society of Agricultural Engineers. He is also the author of The Bigger Book of John Deere and John Deere Tractor Legacy.

Harold L. Brock was chief engineer of the Ford N Series tractors covered in this book. He worked beside Henry Ford and Harry Ferguson, and has inside stories to tell about these men, machines, and their history. He later was an engineer at Deere & Company.;

Andrew Morland is a freelance photojournalist. He is the photographer of numerous Voyageur Press tractor books, including The Bigger Book of John Deere, Vintage Ford Tractors, and Classic Tractors of the World. He lives in Somerset, England.

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, covering subjects from sports cars to motorcycles to farm tractors. Leffingwell is considered one of the top Corvette historians working today, and he enjoys a close working relationship with Chevrolet as well numerous other manufacturers. His previous Corvette titles include Art of the Corvette, Corvette: Seven Generations of High Performance, Corvette Sixty Years, and Legendary Corvettes. He lives in Southern California.