Gr 5-9-- Humanpowered vehicles (HPVs) capture the imagination and ingenuity of modern society. Yepsen discusses these inventions and how they work. A final chapter gives readers hints about making their own HPVs. A list of further reading includes four newsletters and four books, the latest copyrighted in 1981. Black-and-white photographs and drawings show the inventions. Yepsen brings together historical material barely touched upon in books dealing with specific kinds of transportation and includes material on recent improvements of HPVs not easily found elsewhere. --Margaret M. Hagel, Norfolk Public Library System, VA junior high and up
In a book sure to appeal to browsers as well as to students doing reports, Yepsen traces the development of human-powered bicycles, cars, planes, and boats and speculates on the future of human-powered vehicles. The text is readable as well as interesting, and illustrations, including many photographs, appear on nearly every page. In his final chapter, Yepsen offers advice for readers who would like to customize their bicycles to achieve greater speed and efficiency. An extensive list of periodicals and organizations supporting human-powered vehicles is included.