Top Secret 2024 pdf epub mobi 电子书

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发表于2024-09-19

Top Secret 2024 pdf epub mobi 电子书

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出版者:CANDLEWICK BOOKS

作者:Janeczko, Paul B. 编

出品人:

页数:144

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出版时间:2006-4

价格:$ 9.03

装帧:平装

isbn号码:9780763629724

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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.

Top Secret 2024 pdf epub mobi 电子书

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