It's terribly sad to hear about the death of the author, I'm new to the site and have been right thru Tonys website from the link on here and must say I'm impressed, it's one thing to have gathered all this info but hats off to someone who was prepared to share it all too.
I've used one of the tips given out to brown a very old pair of H&H barrels and the results are amazing.
I hope the book becomes available in hard copy as I will buy one ASAP, it looks a fantastic read and source of information.
My thoughts are with Tonys wife and family.
It is without doubt a great loss to the world of shooting.

Rust never sleeps !