Book excerpt: Want to get off the beaten track? This new edition of 'Off-Road Vehicles' shows you how the most popular and rugged ORV's are designed, built, and driven. Learn about the comfortable Toyota Land Cruiser and Range Rover classics, as well as military beasts and hard-working quads. Get to grips with studded tires, sand-blasting dune buggies, and snowmobiles on skis. Take a closer look at the clever design features of the Jeep Wrangler. Strap your seat belt on and get ready for a bumpy ride! The revised and updated 'Designed for Success' series shows how designers create the very best cars, planes, motorcycles, and other exciting vehicles. It explains the many design challenges that designers and engineers must overcome and the factors they must take into account, such as materials, cost, and new technology.