Book of Donmon Teith

Simply and clearly written book, filled with cartoons and easy-to-follow instructions, tells youngsters 8 and up how to break 6 different types of coded message

People throughout history have written messages in code and ciphers to guard and pass along closely held secret information. Today, countries around the world e

Building serious math skills has never been so much fun!

“Mum says it’s for our own protection. London’s just getting too dangerous.” It’s 1941. Hitler’s ruthless Luftwaffe has already started its deadly b

Besides being fun, puzzles increase student involvement and can lead to higher scores on problem-solving tests. Each book in this series has over 175 activities