When the ''happentracks'' of humankind and gnomedom overlap, only the courage of a young gnome named Fang and the fanciful stories of a woman name Nyneve can avert disaster. The cosmic world view of Coney's The Celestial Steam Locomotive and Gods of the Greataway intersects with Arthurian legend in this imaginative, offbeat fantasy of gnomes, knights, and starships. Illustrations not seen. Recommended for fantasy collections. JC