Quite un-necessary, and I certainly hope you reconsider.
Joe, in addition to being extremely intelligent, at the near genius/savant level, has a mercurial personality. This is not the first time he has picked up his marbles and gone home, nor, sadly, will it probably be the last. He will be back. I really like the guy when he stays on topic, but at times his attitude can be maddening. He has, literally, amassed a ton of data, and artifacts, but he did it as a mental exercise for himself. I believe he is fully capable of printing one copy of each of his books for his own library (in fact he once said exactly that) and moving on to some other challenge. I sincerely hope he does otherwise, but only time will tell.