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Learn the Pinhole code,the Inside-out code, the Mixed-up math code, the Pigpen code, and more.
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Ciphers, Juvenile literature, CryptographyEdition | Availability |
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Feedback?January 20, 2024 | Edited by bitnapper | merge authors |
February 14, 2020 | Edited by MARC Bot | remove fake subjects |
March 13, 2018 | Edited by Katipo | Edited without comment. |
January 25, 2012 | Edited by EdwardBot | add books to in library lending |
May 10, 2010 | Created by ImportBot | new work for accessible book |