i think this book is available for a reasonable price, if this link is the book you are talking about. i don't know if i am allowed to provide this link on p,a,'s web site, but i have no relations financially or personally with the people or person behind the ad. but p.a. can delete this link if he sees it as a violation of his policies.
https://rpmhandicappinggiant.com/pro...en-methodolgy/