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© 2026 Ann Mathenge · Built with love, coffee, and cat hair.
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© 2026 Ann Mathenge · Built with love, coffee, and cat hair.
By Christina Ashton
Summary, Provides the history behind codes and ciphers as used in spying and explains how readers themselves can make and use their own secret codes.
Published
1993
Format
-
Pages
110
Language
English
ISBN
155870292X