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Top Secret: A Handbook of Codes, Ciphers, and Secret Writing
Top Secret A Handbook of Codes Ciphers and Secret Writing Author:Paul B. Janeczko Pssst! Inside these TOP SECRET files is everything sneaky young agents need to know about making-and breaking-their own secret codes. — Do you know the difference between a code and a cipher? Can you tell a St. Cyr slide from a Cardano grille? Did you know that a substitution cipher caused Mary Queen of Scots to lose her head? Don’t look... more » now, but packed into this practical field guide is everything a young person needs to know about the art of concealment — making and breaking codes, mastering cipher systems, and experimenting with secret writing. Offering plenty of hands-on practice sessions, tips for creating a code-making kit, sidebars on secret codes in history, and an amusing pair of spies to illustrate techniques, Paul B. Janeczko’s tantalizing TOP SECRET won’t stay a secret for long.« less