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The Kids' Book of Secret Codes, Signals and Ciphers Grant, E. A.

The Kids’ Book of Secret Codes, Signals and Ciphers Grant, E. A.

$5.99

1 in stock

Discusses the history and different varieties of codes and ciphers, describing code machines, signals, sign language, picture languages, and hidden messages.

Author: Grant, E. A.

SKU: CH NF-UU101