London, Methuen, 1937. Hardback First edition and first impression. Near fine with rubbing, slight bumping and toning to endpapers. The jacket is price-clipped with some toning. A 10mm chip across the width of the lower spine. One of only 2513 copies. A highlight of science fiction first editions, and, with Odd John, Stapledon's best known work. Review copy with slip laid in.