WHETHER THEY'RE JUMPING barrels, zipping along the highway on a road trip, or tearing up the motocross track, motorcycles are the coolest things on two wheels Choppers authors Susan Goodman and Michael Doolittle show readers the many types of motorcycles there are, how they work, and some of the exciting jobs, competitions, and events that feature them. This actionpacked Step 3 reader is filled with vibrant color photographs From the Trade Paperback edition.