The Spy Code Handbook: How to Make Code and Cipher Machines to Outfox Your Enemies

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: Paperback
• Language: English
• ISBN: 020717718X
• ISBN13: 9780207177187
• Release Date: January 1992
• Publisher: Angus & Robertson
• Weight: 0.05 lbs.
• Dimensions: 0.1" x 7.0" x 10.1"
• Age Range: 9 to 12 years
• Grade Range: Grades 4 to 7