Top Secret: A Handbook of Codes, Ciphers, and Secret Writing (Booklist Editor's Choice. Books for Youth (Awards))
By Paul B. Janeczko.
Description
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 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 practi...
ISBN(s)
0763609714, 9780763609719
