I think I've read nearly everything JOC wrote. I have about all of his books I think. My most recent acquisition being 45 Worldwide Hunting Adventures, #718 from a limited edition of 1000 and came in a nice slip case.
My favorite firearms writers:
Living: John Barsness
Deceased: Jack O'Connor and Gary Sitton.
Also rans (IMO) Pete Brown of Sports Afield. I thought Warren Page was as dry as dust.