I'm glad you like the book so far.
I have been working on 2 things:
1) the grip especially the part about keeping the right hand off the club except for the fingers and the pincer action of the thumb and forefinger and
2) Swing back with the arms only until the arms are at the midpoint of the swing and then turn the belt buckle

the result on the course and at the range is a lower more penetrating ball flight and consistent.