Martin Gardner

Codes, Ciphers and Secret Writing

“A fascinating, challenging book.” — A. L. A. Booklist. Experiment with cryptography — the science of secret writing. 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 outer space. Hours of intrigue and challenge. 45 diagrams.
181 printed pages
Original publication


How did you like the book?

Sign in or Register
Drag & drop your files (not more than 5 at once)