For a start, let me get an irritant out of the way. Most reference books that I have seen on the subject will give you a hernia if you try to carry them about! The author has done a good job here. Not only is A5 a great size for daily use, but the thoughtful use of plasticised covers will ensure a durable product.
Now to the content. Many Belts are confused post training. They come to Six Sigma poorly equipped to deal with complex processes in a structured and rigorous manner. The examples in the training all seem to work out so well and easily, but confusion is rampant in real life, as reality is seldom as well ordered as in the training domain. Therefore a Belt can really find value in this book, as it clearly charts a course through the improvement project, and aligns the tools and methods with the steps in question.
As a Master Black Belt, I use this book in all my training and coaching of Black Belts. It is also a standard reference hand out to candidate Black Belts.
Bravo...another blow to variation.