Cracking Codes (Totally)

By Diana Kimpton

First the ancient Greeks hid messages under their hair. Then Mary Queen of Scots completely lost her head because of a cracked toe. Now computers create codes no human can crack. "Totally Cracking... This description may be from another edition of this product.

• Format: Paperback
• Language: English
• ISBN: 1407114565
• ISBN13: 9781407114569
• Release Date: January 2010
• Publisher: Scholastic
• Length: 160 Pages
• Weight: 0.20 lbs.
• Dimensions: 7.8" x 0.4" x 5.0"