This book contains photographs and simple text about tractors, explaining what they are, what they do, and the different parts of a tractor. Simple texts explain what the featured machine is and discuss the major parts of each one and what they do. The tires, cab, hitch, plow, planter, and mower are featured in Tractors, while the cars, cargo, engine, and whistle are highlighted in Trains. The glossaries feature easy-to-read-and-understand definitions, such as "loads carried by trucks, ships, trains, or planes" for "cargo" in Trucks and "a machine that uses fuel to move" for "engine" in Ships. With their exciting, full-color photos on every spread, these colorful titles will certainly appeal to the mighty curiosity of young readers interested in machines of all kinds.