“Jean Nepomucene Auguste Pichauld, Comte de Fortsas, was a man with a singular passion. He collected books of which only one copy was known to exist…. [W]hen he died on September 1, 1839 he possessed only fifty-two books, but each of them was absolutely unique. His heir, not sharing the old manâ€™s passion for book collecting, arranged for an auction to sell off the library”
Compelling no? The auction really happened, the rest of it is made up, the creation of a local antiquarian, having a bit of a practical joke. Read more at blacksundae, or see the auction catalog, itself a rarity, on Google Books.