It's a kids book. Would be a good introduction to the subject for an elementary school student....
It's a kids book. Would be a good introduction to the subject for an elementary school student....
Age Range: 10 - 13 years
Grade Level: 3 - 6
Series: Spies and Spying
Library Binding: 32 pages
Publisher: Smart Apple Media (August 1, 2009)
Language: English
ISBN-10: 159920357X
ISBN-13: 978-1599203577
Product Dimensions: 8.8 x 0.2 x 11.8 inches
Amazon Rank: 8023342
Format: PDF ePub TXT book
Discusses how codes work and describes how they have been used throughout history to send secret information and how they have been broken....
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