Cover image for The Usborne book of secret codes / Eileen O'Brien and Diana Riddell ; illustrated by Mark Watkinson.
The Usborne book of secret codes / Eileen O'Brien and Diana Riddell ; illustrated by Mark Watkinson.
TITLE:
The Usborne book of secret codes / Eileen O'Brien and Diana Riddell ; illustrated by Mark Watkinson.
Alternate Title:
Secret codes.
By:
O'Brien, Eileen, 1970-
Publication Date:
1998
Publication Information:
New York : Scholastic Inc.,
Physical Description:
32 p. : col. ill.
Subject Term:
Cryptography -- Juvenile literature.

Ciphers -- Juvenile literature.
Additional Contributors:
Watkinson, Mark.
Language:
English
ISBN:
9780590631525
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