John Henderson is a freelance journalist and photographer specializing in motoring and equestrian subjects. He has written on towing and horse transport matters for Horse and Hound, Horse and many other equestrian and motoring magazines and has towed horse trailers and caravans with a wide variety of vehicles. He is also the author of the Photographic Guides on Towing Horse Trailers, Trailer Maintenance and Preparing for the Towing Test. He and his wife, Carolyn, are co-authors of Clipping, another guide in this series, and his photographs also illustrate several of Carolyn's horse books published by J.A. Allen.