This book is highly rated and I can see why. It tells a great story from life experience. The story is engaging and exciting.
However if you want to get more than a story that's not a book for you. The book lacks research and analysis. The advice is delivered in the form: "it worked for us, so it must be great and you should do the same". While such experience is great to share, it carries little value because it's not transferable in the abstract form.