Classification of Demons

Classification of Demons was written by Peter Binsfeld, a German bishop and theologian who lived in the late 1500s.

Content
This book contains information on demons, notably, the identification of the seven deadly sins not simply as ideas or human vices, but as "actual devils". The book was written in 1589. Bobby implied that this period was the last time the seven deadly sins were unleashed from hell and into earth.

Behind the scenes
It is unknown if the book mentioned in the series had any differences from the real one published in real life.

Appearances

 * Season 3
 * The Magnificent Seven