How to keep a secret
Subtitle: writing and talking in code
By: Elizabeth James & Carol Barkin ; illustrations by Joel Schick.
Contributors: Barkin, Carol.; Schick, Joel, ill.
Edition: Rev. Beech Tree ed.
Publisher: Beech Tree
Published: 1998
Place of publication: New York
Language: eng
Number of pages: 56
Subjects: Ciphers -- Juvenile literature.; Cryptography -- Juvenile literature.; Ciphers.; Cryptography.
Description: Presents various methods of writing, speaking, and signaling secret messages.