Thank you 2-piper.
I agree with you. I read this book. On my mind this trilogy equally with the work of Gen. Journee are the shotgun Bible.
However today we have completely another hulls, wads, powders and shot. What is their influence? The rules, certainly, are the same but their realization is different.
The most modern book I know in this branch is a Bob Brister's book. But I'm looking for something newer if it exists.