From Youtube: CBS Sunday Morning's offbeat correspondent Bill Geist visits a very unusual bookstore near Princeton, Wisconsin. Lenore & Lloyd Dickmans' bookstore is set on a farm, and the books take up 12 buildings, one of which was built from a slurry tank that once brimmed with cow manure. They are voracious book-collectors, and my family has sold books to them before at the Princeton Flea Market in central Wisconsin.