Re: Internal Ballistics book
Simply put, there are only a handful of PhD types on the planet that can can discuss explosion and combustion theory in-depth enough to be able to model/teach it.
Back in the day when I was working on .gov projects, it took us 18 months to find and hire a "combustion modeler". As you can imagine, he was a PhD and he could not communicate on our level, much less write a book for public consumption! But, the guy knew how to predict forces and reactions when shit blew up, I'll give him that.