Penguin Books Ltd, Harmondsworth, Middlesex, England Penguin Books Australia Ltd, Ringwood, Victoria, Australia
First published in the U.S.A. by Berkley Publishing Corporation, 1965 First published in Great Britain by Penguin Books 1967 Copyright © Keith Laumer, 1965
A shorter version of this novel appeared serially in IF Magazine, November-December 1964 Copyright 1964, by Galaxy Publishing Corporation
Made and printed in Great Britain by Cox & Wyman Ltd, London, Reading and Fakenham Set in Monotype Times
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