I used this manual to do my first bow rehair. I read and reread that section until I was familiar with it. Everything went fairly well until the time came to make the final cut of the hair. Cutting length according to the instructions caused the hair to be too short. This caused the bow to always be under tension. Fortunatly I used a throw-away bow to learn on, so I went ahead left the hair on it. My advice is to leave about 1/2 inch more hair than the author suggests. Worst case, you'll have to recut and retie but you won't have to buy another hank of hair.
Also he didn't spend enough time explaining how to get the hair lined up and even. This seems to require a certain amount of practice.
As I recall he also doesn't explain anything measuring the hair. I couldn't understand how I could cram all that hair into such a small place. I didn't find out until later that there are tools for measuring hair
The author seems to have several decades of experience working on violins, but little, if any, formal training. So his knowledge may not be as well rounded as someone who has graduated from a luthier school. I got the impression that this is the way he always did it and his dad did it, so there was no need to research how others might do it. Still, I have no other book on subject to compare it against.