First UK edition, first printing (previously published in the USA). 320pp. Black cloth-covered boards with gilt titles on the spine. 8vo. Upper text block edge is dust spotted else volume neat, clean, bright and tight throughout. In its original shelf worn dust wrapper, bumped and rubbed at edges with a couple of small nicks along upper edge.
A collection of speculative, scientific essays from a decade of Isaac Asimov's thinking, spanning the range of his interests on the known and the unknown - science, conjecture and science fiction.