Cipher and decipher codes: transposition and polyalphabetical ciphers, famous codes, typewriter and telephone codes, codes that use playing cards, knots, and swizzle sticks . . . even invisible writing and sending messages through space. 45 diagrams.
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Cipher and decipher codes: transposition and polyalphabetical ciphers, famous codes, typewriter and telephone codes, codes that use playing cards, knots, and swizzle sticks . . . even invisible writing and sending messages through space. 45 diagrams.
Read Less
Add this copy of Codes, Ciphers and Secret Writing (Dover Puzzle Books) to cart. $2.95, new condition, Sold by Gulf Coast Books rated 5.0 out of 5 stars, ships from Memphis, TN, UNITED STATES, published 1984 by Dover Publications.
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