Secrets, signs, signals & codes
By: by Shari Lewis ; Leo Benhke, consultant ; ill. by Helen McCarthy ; art direction by John Brogna.
Contributors: McCarthy, Helen.
Series: Kids-only club
Publisher: Holt, Rinehart and Winston
Published: 1980
Place of publication: New York
Language: eng
Number of pages: 95
Subjects: Ciphers -- Juvenile literature.; Cryptography -- Juvenile literature.; Writing, Invisible -- Juvenile literature.; Signs and symbols -- Juvenile literature.; Ciphers.; Cryptography.; Signs and symbols.
Description: Discusses codes, silent signals, invisible writing, and other ways to conceal messages.
Notes: Includes index.