Mysterious Messages: A History of Codes and Ciphers

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Mysterious Messages: A History of Codes and Ciphers - Blackwood, Gary L

Examines history's most dangerous secrets and ciphers, and shows young spies how to use them for themselves.

Mysterious Messages: A History of Codes and Ciphers 2009, Dutton Children's Books, New York, NY

ISBN-13: 9780525479604

Hardcover

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