NOVELS Prelude to Space (New York, Galaxy SF Novel, 1951; revised, London, Sidgwick & Jackson; revised, New York, Gnome Press, 1954; as Master of Space, New York, Lancer, 1961; as The Space Dreamers, New York, Lancer, 1969) Pan Books 301, (Aug) 1954, 2/-. Cover by Gerard Quinn Four Square Books 755, 1962, 159pp, 2/6. Four Square Books 1097, 1968, 159pp, 3/6. New English Library, 1980. Cover by Gordon Davies New English Library 0450-03186-1, 19??. The Sands of Mars (London, Sidgwick…