Codemaster Book 1 : how to write and decode top-secret message
Miller, Marvin
Codemaster Book 1 : how to write and decode top-secret message / Marvin Miller. - New York : Scholastic Inc., c1998. - 69 p. : ill. ; 19 cm.
0-439-62717-6
Ciphere -- Juvenile literature.
Cryptography -- Juvenile literature.
652.8 M649 1998
Codemaster Book 1 : how to write and decode top-secret message / Marvin Miller. - New York : Scholastic Inc., c1998. - 69 p. : ill. ; 19 cm.
0-439-62717-6
Ciphere -- Juvenile literature.
Cryptography -- Juvenile literature.
652.8 M649 1998