Penguin Books Ltd, Harmondsworth, Middlesex, England
Penguin Books Pty Ltd, Ringwood, Victoria, Australia
First published in the U.S.A. by Clarkson N. Potter Inc. 1960 Published in Penguin Books 1965
Copyright © Martin Gardner, 1960
Made and printed in Great Britain by Richard Clay (The Chaucer Press) Ltd, Bungay, Suffolk
This book is sold subject to the condition that it shall not, by way of trade, be lent, re-sold, hired out, or otherwise disposed of without the publisher's consent in any form of binding or cover other than that in which it is published