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Top Secret - A Handbook of Codes, Ciphers and Secret Writing (Paperback)
Loot Price: R244
Discovery Miles 2 440
You Save: R55
(18%)
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Top Secret - A Handbook of Codes, Ciphers and Secret Writing (Paperback)
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List price R299
Loot Price R244
Discovery Miles 2 440
You Save R55 (18%)
Expected to ship within 10 - 15 working days
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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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