Book excerpt: Four-wheel-drive trucks compete in many types of motorsports where no car would dare show its face. To realize the ultimate potential of a competitive truck, many off-road activities are fitted to four-wheel-drive trucks to race on mud, rock and sand. These trucks are shown in action: there’s nothing like four heavy-lugged tires clawing for traction and throwing up clouds of dirt and rocks, “Tough Trucks” navigating jumps, water and obstacle courses, Monster Trucks in flight, trucks drag racing through sand, mud and uphill, 4x4s pulling the heaviest loads possible, the ultra-slow rock-climbing trucks racing to get over the toughest of obstacles requiring a delicate touch on the throttle and a skilled use of the suspension system, and Trail Riding which combines a number of rock-climbing obstacles over the length of an off-road trail.