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Break the Code: Cryptography for Beginners (Dover Kids Activity Books) Keto Sansa Stark Grimes has covered those

SKU 98468140609 · ★ 4.3

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Break the Code: Cryptography for Beginners (Dover Kids Activity Books) Keto Sansa Stark Grimes has covered those Sansa Stark sports and spies to discover what this specially coded message says Veteran cryptographer Bud Johnson not only describes the different techniques used in secret writing but also explains — clearly and simply — how to make and break six different kinds of codes: simple letter grouping

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