Mysterious Messages: A History Of Codes And Ciphers
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| Google books | books.google.com |
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| Originally published | October 29, 2009 |
| Authors | Gary Blackwood |
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| Date of Upd. | |
| ID | 2082452 |
About Mysterious Messages: A History Of Codes And Ciphers
History?s amazing secrets and codes?and how to crack them yourself. This fascinating look at history?s most mysterious messages is packed with puzzles to decode and ciphers that kids can use themselves. . . .