Codes, Ciphers and Secret Writing Expand
Codes, Ciphers and Secret Writing

Codes, Ciphers and Secret Writing

Dover Publications



Experiment with cryptography — the science of secret writing. Cipher and decipher codes: transposition and polyalphabetic ciphers, famous codes, typewriter and telephone codes, codes that use playing cards, knots, and swizzle sticks...even invisible writing and sending messages through outer space. Hours of intrigue and challenge. 45 diagrams.

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Product Details:
ISBN 10:  0486247619 
ISBN 13:  9780486247618 
Author/Editor:  Martin Gardner 
Format:  Book 
Grade level:  4 - 7 (ages 9 - 12) 
Page Count:  96 
Dimensions:  5 3/8 x 8 1/2 
Publication date:  October 1984 

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