I have most of O'Connor's books and quite a few of Elmer's books as well including BIG GAME RIFLES and KEITH'S RIFLES FOR BIG GAME which I understand is a hard one to find and originals bring very big bucks. KInd of interesting as BIG GAME RIFLES was written in 1936 where Keith considered the 30-06 a fairly decent big game rifle and the latter book in 1946 where the 30-06 was literally not fit for shooting rabbits.
I've heard that when HELL, I WAS THERE came out, Elmer was quite upset about the use of the word "HELL" in the title. Apparently he did not like profanity of any type, even in the mildest of forms.
Paul B.