First off, the essence of the book is available on the book web site. The book takes that information and puts dialog and stories around it.

If you know Agile or Scrum or Kanban, there isn't much here that is unique. The book takes one through a milestone based week, day by day, for a team to deliver something on this methodology.

What's missing is how to bring this culture to one's workplace - implementing this will need management and financial support. Nothing is free. Large companies can do these types of iterations. Smaller companies fighting for their life probably won't be able to.

It's well written. And a quick read. I found the heavy paper to be kind of annoying as I thought I might have turned more than 1 page. But I'm giving it a lower score given the essence is available on the book web site and the dialog in the book doesn't provide much additional value other than to demonstrate the value of the methodology. The writers do discuss several project failures - and for someone doing Agile or this methodology, you will have failures.