I really liked the book, and enjoyed a lot reading it. It is compact and short, but very well understandable, and nicely written. No boring examples, no endless repetition of one idea, but 10 well formulated principles, with to do’s and even with summaries after each chapter. One for each principle by the way.
My advice would be, not to read the book too fast, but stepwise, chapter wise, and to really take seriously the proposed self reflecting exercises…