Dozens of intriguing puzzles pose and answer interesting questions based on world history, geography, popular culture, and many other subjects. Alphabet and num

Explains various methods used in cryptography and presents examples to help readers in breaking secret codes

Kids love secret codes, and this book offers dozens of intriguing challenges with insights into U.S. history, geography, pop culture, and a host of other subjec

Welcome to The Little Book of Secret Code Puzzles. If you've never solved a code puzzle before, or never even heard of a Code Puzzle, you're holding a book in y

Code-cracking skills can be put to the test in this entertaining book which teaches children how to write and decode secret messages. Includes Semaphore and Mor