Really?. I think it is really well written. There is lots of theory, I would have thought that might almost have been a disadvantage to some readers who want to get on to the instructions, though they have only to turn the page.
"gregarious" step by step info? I would have thought a step by step approach to making something was about right.
I would agree however that if one was expecting 200 pages of theory it does break down into chapter projects after the first 30 pages, and from that point on one's payback from the book is dependant on one's wanting to make the projects covered. This is possibly misleading if one considers that the book is called "Gas Burners" and of the 200 pages, only about 75 is on that subject with some more info on diffuse burners, and then forge projects.
It really should be called Gas Burners, Forges, Furnaces, and Kilns. Rather than Gas Burners, for Forges,... And if that is your point you're dead on. This will disappoint someone wanting 200 pages on burners only.
I don't know how your friend's burner worked, but these burners, and the rex, are supposed to be a lot hotter or more efficient that the Rheil. Though I am making a bunch of the various hand made types, and have 3 Rex burnners, I'm not at that point where I can compare them. Rheil isn't in any doubt, he now uses the Rex burners, rather than his own. They are supposed to accelerate the gas flow better, and mix with air better, and be more tuneable, I guess we will see. I think these burnners look easier to make that the Rheil style because of design and materials factors. Notably the fact one doesn't need to drill aperatures, and also the parts are going to be truer, not based on threaded black pipe bodies for alignment. There are also more parts alternative given.