Gear up for a journey into the mud-splashing, trailblazing world of all-terrain vehicles! Learn why these rugged runners are loved by farmers, hunters, and racers! In this book, readers in grades 4-8 will discover how these adaptable autos evolved from three to four wheels. This information- and photo-packed series introduces readers to the coolest off-road vehicles on the market and in the military. Each book in the series revs readers' engines with amazing details and eye-catching images. These high-interest books feature stand-alone spreads, so readers can flip pages and read in any order. Glossary words are defined on the page where they appear, boosting reader comprehension.