The Spy Code Handbook

by Duncan Ball and Ian Ball

Book Overview

Offering an introduction to the world of secret writing and coded messages, this book contains simple instructions on how to make 12 different code and cipher machines. Some of them are based on... This description may be from another edition of this product.

• Format: Hardcover
• Language: English
• ISBN: 020717718X
• ISBN13: 9780207177187
• Release Date: January 1992
• Publisher: HarperCollins Publishers
• Weight: 0.60 lbs.
• Dimensions: 0.1" x 7.0" x 10.1"
• Age Range: 9 to 12 years
• Grade Range: Grades 4 to 7