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Spy Codes and Ciphers
Spy Codes and Ciphers
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ISBN 9781598453539
- Published
- Jan 2012
- Language
- English
$13.62
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Brand New
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About this book
Can flashing lights send out a secret message? Did a famous spy use sketches of butterflies to hide messages? Can a digital photo hide a secret code? For centuries, spies have used many different ways to pass secret information. Codes and ciphers keep information safe from the enemy. Author Susan K. Mitchell uncovers the secrets to the amazing world of spy codes and ciphers.
Specifications
PublishedJan 16, 2012
ISBN-10159845353X
ISBN-139781598453539
LanguageEnglish
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