About 15 years ago, I accompanied my wife to a garage sale where the only items of potential interest to me were some books. Hardcover books were priced at a dollar and I was delighted to find an old copy of Mises’ magnum opus, Human Action. As I handed the owner his dollar, he said, “By the way, that book is signed by the author. He was my professor.” And sure enough, it was signed by the master himself.