This book is primarily about coaching skills. It's not a handbook for professional coaches, and the authors are clear about that. It's organized well: focus on you the reader or individual, coaching, coaching individuals, coaching in organizations, and coaching in the world.
For professional coaches, it aligns well to the ICF core competencies, and the references are excellent!
I got the most value from the exercises at the end of the book rather than the ones at the end of each chapter, but depending on where you are in your coaching journey, you might find these questions valuable for your own "self-coaching."