Literary Rescue

Secret Messages

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Codes and Ciphers Secret Writing Through the Ages – John Laffin

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Codes, Ciphers, and Other Secrets – Karin N. Mango

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Codes, Ciphers, Secrets and Cryptic Communication: Making and Breaking Secret Messages from Hieroglyphs to the Internet – Fred B. Wrixon

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Secret Messages: Concealment, Codes, and Other Types of Ingenious Communication – William S. Butler, L. Douglas Keeney

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The Secret Science of Covert Inks – Samuel Rubin

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