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Fun with Secret Writing (Dover Children's Activity Books)
$14.97 USD
$11.98 USD
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Competitive Pricing You Can Trust — Quality You Can Rely On.
ISBN: 0486420981
Author: Lamb, Geoffrey
Condition: New
Fascinating, easy-to-understand book for would-be cryptanalysts of all ages teaches how to invent and decipher a host of codes and secret messages, including the "Moving Ahead" cipher used by Julius Caesar; dots and pinpricks, as used by the secret Rosicrucian society; and even a system used by Sherlock Holmes. 14 black-and-white illustrations.
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Fun with Secret Writing (Dover Children's Activity Books)
$14.97 USD
$11.98 USD