London, Hodder & Stoughton, 1937. First edition, first impression. Hardback. A very good copy. Science fiction with an early example of an EMP. The jacket has a few 10mm or so tears, some heavy crushing to the head of the spine and some creasing, some toning to the rear panel. Tape reinforcement to jacket interior. Boards are toned and a little grubby. A nice book. [Locke, Spectrum: I-170; Clute, Encyclopedia, p891] Cover art by Bip Pares [9701, Hyraxia Books].