Indeed he does. He will probably even sell you a copy of his book. But it's readily available through online outlets anyway.
I truly feel that the hypotheses of people such as James Nixon and GBO on this forum are the most useful in ruminating on this incident. One has the gut feeling that when the (real) facts are finally known---it they're ever known---it'll be proven to be something as prosaic (by comparison, that is) as one of these theories, as opposed to the fanciful other ones.