When this book came out, I was a little too old to fully appreciate it, but my two younger brothers absolutely adored this book. Sometimes it is difficult to get young boys reading and then getting them interested in what they are reading. With this book, I have seen kids who absolutely hate reading tear this book up! The students love it. This book is appropriate from any grade 2nd through 8th. You could do a book study or (a fun activity I saw on pinterest) a multiplication game that goes along with the book!