Presents a variety of codes and ciphers and includes messages to encode and decode, nearly all of which are part of a story.
"synopsis" may belong to another edition of this title.
Book Description Holt, Reinhart and Winston, New York, 1981. Hardcover. Book Condition: Good. Dust Jacket Condition: Fair. Bookseller Inventory # 6076
Book Description Holt, Rinehart, and Winston, 1981. Hardcover. Book Condition: Good. Good condition, some are ex-library and can have markings. Bookseller Inventory # GD-001-46-4934004