Synopsis
Presents various methods of writing, speaking, and signaling secret messages.
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How to Keep a Secret : Writing and Talking in Code
Published by
HarperCollins Publishers, 1978
ISBN 10: 0688418287
ISBN 13: 9780688418281
Used
Hardcover
Seller: Better World Books, Mishawaka, IN, U.S.A.
Seller rating 5 out of 5 stars
Condition: Good. Former library book; may include library markings. Used book that is in clean, average condition without any missing pages. Seller Inventory # 47876244-6