The book is well written, reflecting level of education. The author is no dummy.
However, the community is better served to realize that there is a divide between Modern Portfolio Theory, followers of quantitative methods ad infitum, and those followers of Practical Portfolio Theory, who are more or less followers of the Edwards & Maggee/Wyckoff schools of trading thought.
My recommendation is to identify to which school of thought you belong and simply lay to rest the other quack books that come along.