TheCodeBreakers
THE
Codebreakers
The Story of Secret Writing
By DAVID KAHN
(abridged by the author)
A SIGNET BOOK from
NEW AMERICAN LIBRARV
TIMES MIRROR
Copyright © 1967, 1973 by David Kahn
All rights reserved.
No part of this book may be reproduced or transmitted
in any form or by any means, electronic or mechanical,
including photocopying, recording or by any information
storage and retrieval system, without permission in writing
from the publisher. For information address
The Macmillan Company, 866 Third Avenue, New York,
New York 10022.
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