Throughout history, army generals, spies, and even scientists have guarded information through secret codes. Find out how they did it and learn how to create your own secret codes. You and your friends can share secrets that will leave everyone else scratching their heads.
© 2020 Capstone Press (Lydbok): 9781476572352
Utgivelsesdato
Lydbok: 5. februar 2020
Throughout history, army generals, spies, and even scientists have guarded information through secret codes. Find out how they did it and learn how to create your own secret codes. You and your friends can share secrets that will leave everyone else scratching their heads.
© 2020 Capstone Press (Lydbok): 9781476572352
Utgivelsesdato
Lydbok: 5. februar 2020
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