Good book wrong title.
To be totally honest with you, I have been so busy that I only had a chance to read three (3) chapters in their entirety. However, I did scan through the most of the book. I am probably a little biased in my comments regarding the book, as I am a Agile/Scrum evangelist myself. You may be wandering how that is a bias for a book about CSS, right? It so happens that the book is not about CSS as much as it is about managing the development process using agile techniques.
Project management appears to be the primary topic with CSS/Web development sprinkled throughout the material, primarily for demonstrative purposes. There are a couple solid CSS chapters. I would have read this book simply for the Project Management content. The content regarding all the processes which should be in place to make your team more agile is practical and useful for someone that has not had the chance to practice being agile or is relatively new to Scrum.
I would probably not recommend this book, if you are looking for in-depth CSS coverage. HOWEVER, I would definitely recommend reading the book to team members new to agile or scrum.