Son of the Demon was a graphic novel that was part of the late 80s wave of "darker and grittier" Batman comics post Dark Knight Returns. Unlike comics from that era that are considered classics today like DKR, the Killing Joke, and a Death in the Family, this has fallen to the wayside.
A shame because Son of the Demon one of the best Batman comics I've ever read.
The comic brings a lot of novel ideas to the table for Batman, seeing an almost father-son like bond grow between Bruce and Ra's Al Ghul as well as Batman trying to train the League of Assassins in unarmed combat. It doesn't hurt that it falls under my favorite category of Batman stories, taking place outside of Gotham, often feeling more James Bond than Batman.
If Jerry Bingham was more prolific, I have no doubt in my mind that his name would be brought up when discussing the best Batman artists. Bingham's fight scenes are kinetic and his anatomy perfect. His line work and use of shadows is like a cross between Gene Colan and Barry Windsor Smith.
When tracking this book down, I would recommend getting the original larger sized version as opposed to the later, smaller reprints. In the 1980s Marvel, DC and other American comic publishers experimented with graphic novels the size of European albums, something I wish they continued with.
My only major critique is that multiple points in the book, Batman gives his whole "killing is wrong" spiel that you would come to expect, but throughout the course of the story I would argue indirectly murders some criminals when he let's a hostage taker get sprayed with acid, causes a helicopter to crash, and a moment towards the end that I won't spoil. Really weird for a Batman story.