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TOP SECRET : A HANDBOOK OF
CODES, CIPHERS, AND SECRET WRITING
Cambridge, Mass. : Candlewick,
IL 3-6, RL 7.4
codes. The stuff of spies and secret agents. There is something
fascinating about sending and receiving messages in a code that others
can't read. Do you and your friends have your own codes for IM or
passing notes in class? Are you fascinated with code talking?
Maybe you picture yourself as a world class code breaker. This is
the book for you. Filled with codes, ciphers and secret writing,
you are sure to find plenty in here to keep you guessing.
Permission is granted for the
noncommercial duplication and use of this resource, provided it is substantially
unchanged from its present form and appropriate credit is given.