I am glad this book exists. Many, especially the youthful cohort, could really benefit from it. Watanbe presens three basic problems or goals and shows how to rightfully solution them using thought-out, processed thinking. He shows how to use tools like logic trees, pro/con analysis, four quadrant matrix, hypothesis pyramids to diagnose problems in an easy-to-understand way (the book is written for kids, mind you). While the problems are geared towards those in which kids would face, it shows how every single problem can be solved in a similar fashion: understanding, identifying, solutioning and executing.
I would think this would be mandatory reading for every grade 10 class, because the mi.dframe it endows you with is extremely powerful.