First edition, first printing. Publisher's original dark blue cloth with gilt titles to the spine, lacking the scarce dust jacket. A very good or better copy, the binding square and firm, the cloth bright and unmarked. The contents with some foxing to the text block edge are otherwise clean throughout and without previous owner's inscriptions or stamps. Publisher's eight page catalogue coded "930" to the rear.
The author's first novel, considered a major work of utopian fiction featuring early descriptions of genetic engineering. (Bleiler).
Stock code: 18081