Abelard-Schuman, London, 1970.  ISBN 0-200-71625-5.  Hard cover, 176 pages including Index.  Very good; blue boards with red foil lettering on spine; binding sound.  Dust jacket with price intact has edge and cover wear, short edge tears, some age-toning and soil.  Book interior clean and unmarked; illustrated with black & white photographs.  ‘Christopher Cockerell, “father” of the hovercraft, not only liked sailing boats, but designing and building them.  Like every serious boatbuilder before him, he tried to think of ways of reducing the friction between water and hull, but unlike many others, he realized from the start that air was the only possible medium. … Garry Hogg describes the operation of these vehicles over sea, land, ice, desert, and in peace and war.’ (from front flap)