The first part of what is so great about this book is that it is chopped up into very short chapters. Each chapter has a parable about working hard, earning what you want to receive, honesty, integrity, kindness, remaining positive, and so on and so forth.
This is the kind of book that I could read to the class (and trust me, I will) one chapter at a time and lead a discussion after each chapter. Told through the narrative of a sensei and his student, it is easy to read and easy to understand. It reads like a corporate motivation book (see Who Moved My Cheese? or 7 Habits Of Highly Effective People), but it is better, because this one applies to children every bit as much as it should to adults.
It's not everywhere yet; I had to search it down (and ended up with two!), but once it becomes more popular and widespread, it's definitely worth a read.