Penguin Books Ltd, Harmondsworth, Middlesex, England Penguin Books Australia Ltd, Ringwood, Victoria, Australia
First published in the U.S.A. 1966 Published in Penguin Books 1967 Copyright © Frank Herbert, 1966
A different version of this novel appeared in GALAXY, under the title ‘Do I Sleep or Wake’ Copyright © 1965, by Galaxy Publishing Corp.
Made and printed in Great Britain by Hunt Barnard & Co Ltd, Aylesbury, Bucks Set in Monotype Baskerville
This book is sold subject to the condition that it shall not, by way of trade or otherwise, be lent, re-sold, hired out, or otherwise circulated without the publisher's prior consent in any form of binding or cover other than that in which it is published and without a similar condition including this condition being imposed on the subsequent purchaser