The author/illustrator's pictures are beautifully textured in four colors. On page after page, they go from the delicately detailed spirals of spider webs to the tough, hempen, spiral that forms the bottom of a rope basket. The spinning shapes of screws, augers, curled leaves are all hymned and drawn. Nevertheless, the explanations that go with the functions of the spiral shape, in whatever form it is found, leave too much unsaid. The book ends with an illustration of the earth as part of an orbital spiral. As an example of a concept book concentrating on spatial relations, it seems that the point is being made with maddening subtlety.