Loads of Codes and Secret Ciphers

by Paul B. Janeczko

Book Overview

Discusses and provides practice in making and breaking codes and ciphers, as well as in building simple coding devices to transmit secret messages. This description may be from another edition of this product.

• Format: Hardcover
• Language: English
• ISBN: 0027478106
• ISBN13: 9780027478105
• Release Date: October 1984
• Publisher: MacMillan Publishing Company
• Length: 108 Pages
• Weight: 0.85 lbs.
• Dimensions: 0.7" x 6.4" x 9.6"
• Age Range: 9 to 12 years
• Grade Range: Grades 4 to 7