Codes & Ciphers: Hundreds of Unusual and Secret Ways to Send Messages

by Christina Ashton

Provides the history behind codes and ciphers as used in spying and explains how readers themselves can make and use their own secret codes. This description may be from another edition of this product.

• Format: Paperback
• Language: English
• ISBN: 155870292X
• ISBN13: 9781558702929
• Release Date: January 1993
• Publisher: Betterway Publications
• Length: 110 Pages
• Weight: 0.40 lbs.
• Dimensions: 0.3" x 6.0" x 8.9"
• Age Range: 12 years and up
• Grade Range: Grade 7 and higher