This book introduces young readers to the exciting world of transport. Divided into three sections, it gives clear descriptions of the scientific principles behind planes, cars and boats. The first section shows how planes stay up in the air, how helicopters fly and also looks at wind power and space flight. The second section explains how cars work, with details about the engine, gearbox and brakes, and describes many types of motorbikes and trains. The final section explains how ships float, and gives interesting facts about liners, hovercrafts and submarines. The clear, simple text and bright, detailed illustrations combine to make this a lively introduction to a fascinating subject.