 He only printed so many copies, and they all sold out. And then the book was still in such high demand that every time a used copy would come on the market, it would get snapped up at outrageous prices. And one time I talked to him, I said, why don't you just republish Penetration? It's so popular, it's in such demand. He said, well, maybe someday, but right now I just want to see how expensive the used copies get.