Based on one of the most popular segments in Boy's Life magazine, a collection of codes offers the secret to writing and solving codes, includes a decoder wheel, and presents such challenges as the Pigpen code and the Mixed-up Math Code. Original.
"synopsis" may belong to another edition of this title.
Seller: Better World Books, Mishawaka, IN, U.S.A.
Condition: Good. Used book that is in clean, average condition without any missing pages. Seller Inventory # 38878080-6
Seller: ThriftBooks-Atlanta, AUSTELL, GA, U.S.A.
Paperback. Condition: Fair. No Jacket. Readable copy. Pages may have considerable notes/highlighting. ~ ThriftBooks: Read More, Spend Less. Seller Inventory # G0590373862I5N00