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Unsolved!: The History and...
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The Devil Colony: A SIGMA...
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The Essential Turing: Seminal...
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An Encrypted Clue
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Code Cracking for Kids:...
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The Doomsday Key: A SIGMA...
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A Desperate Fortune
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Secret History: The Story of...
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In Search of Truth
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Book of Souls
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Elementary Cryptanalysis
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Encrypt, Sign, Attack: A...
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Games with Codes and Ciphers
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The Mayor's Wife
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Chameleon Chaos
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Mathematical Recreations and...
W W Rouse 1850-1925 Ball
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Cryptanalysis : a study of...
Helen Fouché Gaines
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