Notes: • "This text first published in Great Britain 1974 by The Elmfield Press". • "Hamlyn Paperbacks edition 1981". • The artist is not credited, Melvyn is on the artwork • Shorter and substantially different versions of the three sections of this novel were published separately in Science Fiction Adventures (c) 1962 by Nova Publiscations Ltd, London. The three sections, with numerous minor alterations, were published in book form and copyright (c) 1962 by Ace Books Inc., New York. • "The present completely revised and considerably expanded text is copyright (c) 1969 and 1974 by Brunner Fact and Fiction Ltd." • Printed and bound in Great Britain. • $3.95 in Australia