Can you guess what "anthropodermic bibliopegy" is? No? Well, it's the binding of books with human skin:
Much of the text is in French, and it was not uncommon around the time of the French Revolution for books to be covered in human skin.
The practice, known as anthropodermic bibliopegy, was sometimes used in the 18th and 19th centuries when accounts of murder trials were bound in the killer's skin.
Anatomy books also were sometimes bound in the skin of a dissected cadaver. In World War II, Nazis were accused of using the skin from Holocaust victims to bind books.
So, old Ed Gein was just following a centuries-old tradtion. I'll just stick with vaccinodermic or porcodermic, if you don't mind.