I read this book cover to cover. It started a bit slow, and I don't necessarily find a lot of value in his introduction of the project balance sheet concept, though it is a neat concept and may be of value to some. The meat is really after that (but I would read it all since it flows nicely). I found it enjoyable, and a nice primer on some topics many PMs never get into. The last section on Quantitative Contract management seemed like an after thought, or a rush to finish - it was accurate but not as thorough or elaborative as the rest of the book. All that being said, I find this book to be a 4 out of 5 because PMs do not get as good of a foundation in this material as much as they should - there are few books that cover it at all as a focus topic, and John does a good job doing just that. A 2nd edition is likely overdue.