Explains what codes are, details some of the famous codes in history--including the Morse, Window and Invisible Ink Codes--and shows how children can invent their own codes
"synopsis" may belong to another edition of this title.
Presents several easy codes with messages to decode and directions for making and writing with invisible ink and devising one's own code.
"About this title" may belong to another edition of this title.
Seller: BooksRun, Philadelphia, PA, U.S.A.
Library Binding. Condition: Fair. The item might be beaten up but readable. May contain markings or highlighting, as well as stains, bent corners, or any other major defect, but the text is not obscured in any way. Seller Inventory # 0531041468-7-1-13
Seller: Better World Books: West, Reno, NV, U.S.A.
Condition: Good. Former library copy. Pages intact with minimal writing/highlighting. The binding may be loose and creased. Dust jackets/supplements are not included. Includes library markings. Stock photo provided. Product includes identifying sticker. Better World Books: Buy Books. Do Good. Seller Inventory # GRP80475592
Seller: ThriftBooks-Atlanta, AUSTELL, GA, U.S.A.
Hardcover. Condition: Fair. No Jacket. Former library book; Readable copy. Pages may have considerable notes/highlighting. ~ ThriftBooks: Read More, Spend Less. Seller Inventory # G0531041468I5N10