Making Secret Codes

By Jillian Gregory

Throughout history, army generals, spies, and even scientists have guarded information through secret codes. Find out how they did it and learn how to create your own secret codes. You and your friends can share secrets that will leave everyone else scratching their heads.

• Format: Library Binding
• Language: English
• ISBN: 1429645679
• ISBN13: 9781429645676
• Release Date: August 2010
• Publisher: Capstone Press
• Length: 32 Pages
• Weight: 0.05 lbs.
• Dimensions: 0.3" x 9.1" x 7.2"
• Age Range: 8 to 14 years
• Grade Range: Grades 3 to 9