They say not to judge a book by a cover, but what if the cover is made of human skin?

When a doctor received a book as a present in the 1800s, he wrote in a note left with the book that he had covered it with "this piece of human skin taken from the back of a woman." Now, Harvard conservators and scientists say they are 99 percent sure that Dr. Ludovic Bouland was telling the quite literal truth. An analysis of microscopic samples from the binding through peptide mass fingerprinting revealed the substance to be human or a related primate.