The premise of this book is to build up your embouchure. It has alot of excercises to achieve this goal, so you have to dedicate sometime to it. The first half of the book is geared to beginners and doesn't go above a Staff G. The second half of the book the exercises get more involved and technical. These technical registers the author belives can only be developed through lower register exercises. This make sense. I liked the book and I am using it but I wish there was more written verbiage and explanation to fully understand the practice method.