Top Secret

Twenty years after my first book of codes and ciphers was published, I'm still crazy about the subject. When I was given the chance to write a new book on the subject, I grabbed it. This book is filled with examples and exercises to test the skill of the most tenacious code maker and code breaker. Plus, you'll learn a little about history, math, and science along the way. Even the illustrations in this book are a lot of fun.



The Buzz . . .

An International Reading Association Children's Choices Award Winner

A Booklist Editors' Choice

A School Library Journal Best Book of the Year

A Junior Literary Guild Selection

A Cooperative Children's Book Center Choice

"The author's upbeat, positive tone is refreshing and his enthusiasm about his topic is contagious."
— School Library Journal (starred review)

"Puzzle-loving kids . . . will take to this packed-to-the-gills volume like a spy to a cat suit."
— Booklist (starred review)

"This thoroughly engrossing title easily achieves its mission."
— Family Fun