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Preferred library: Granisle Public Library? Results 1 - 10 of 729 (page 1 of 73)
The book of codes : understanding the world of hidden messages : an illustrated guide to signs, symbols, ciphers, and secret languages / Paul Lunde, general editor.
ALL KINDS OF CODES
CODES AND CYPHERS
Making secret codes and messages / by Deanna Caswell.
CODES, CIPHERS, AND OTHER SECRETS.
Secret messages : a collection of puzzles using codes and  ciphers
Codebreaking : a practical guide / by Elonka Dunin and Klaus Schmeh.
The Secret of the Puzzle Box : v. 6 : Code Busters Club / Penny Warner.
The cipher disk.
Top secret [book] : a handbook of codes, ciphers, and secret writing / Paul B. Janeczko ; illustrated by Jenna LaReau.

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