. . "Discusses the fastest motorbikes and racing bikes, including how they got their start and records set by various bikes." . . . . . . . . "Motorbikes"@en . "Motorbikes" . . . . "Describes different kinds of motorcycles and how they are designed, discussing such topics as engine power, superbikes, off-road racers, and drag racing."@en . "Juvenile works" . "Juvenile works"@en . . . . .