Synopsis
Presents various methods of writing, speaking, and signaling secret messages.
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How to Keep a Secret: Writing and Talking in Code
Seller: Hawking Books, Edgewood, TX, U.S.A.
Seller rating 4 out of 5 stars
Condition: Good. Ex-library book with usual markings. Good Condition. Five star seller - Buy with confidence! Seller Inventory # X0688518281X3