Top Secret: A Handbook of Codes, Ciphers and Secret Writing, Paperback

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5 Review(s)
"The author's upbeat, positive tone is refreshing and his enthusiasm about his topic is contagious." -- SCHOOL LIBRARY JOURNAL (starred review) Pssst Do you know the difference between a code and a cipher? Can you tell a St. Cyr slide from a Cardano ...
Cod: f8a0efc8-372c-48e7-a2e1-0d438b6ea3bb / 189934
Disponibilitate: In stoc
Producator: Candlewick Press (MA)

32.55 RON


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"The author's upbeat, positive tone is refreshing and his enthusiasm about his topic is contagious." -- SCHOOL LIBRARY JOURNAL (starred review) Pssst 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 the discovery of 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 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.
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