I do own everything he ever wrote....collected hardcover works with leather bindings and acid-free paper. Not long after he died, this collection was offered as a subscription item. It includes most, if not all, of his short stories, as well as full books, with commentary by his son. I have re-read them many times.
I wish he had lived long enough to finish "The Walking Drum".
That’s the set I bought at that estate sale for a hundred bucks. :-)