New York, Alfred A. Knopf, 1943. First Edition. First Impression. Hardback. A very good copy in a good jacket. A significant work of science fiction. Published the previous year in three parts in Black Mask. Adapted for cinema three times, and also for Orson Welles' radio dramatisation (of War of the Worlds fame). An over-powered brain in a vat, not much more that needs to be added to that synopsis. A somewhat popular trope. [Bleiler, p180: Paranormal abilities and biological SF: Pringle, p91]. Head of spine chipped, some rubbing to the edges and a few other chips and tears. A little bumping to the spine tips and some dusting to the top edge. Some splitting along the folds, some staining to the jacket. Quite worn. Cover art by W. Deffaa [8270, Hyraxia Books].