|Encyclopedia of Demons|
To bait mortals intending to prove the existence of demons.
The Encyclopedia of Demons is a book used by the demon Libris as a device to find and kill mortals who try to prove the existence of demons. It is located in a public library in San Francisco. Charlene Hughes was one of his victims. Phoebe Halliwell, after learning as much as possible from Charlene's spirit, removed the same book from its shelf to draw out the demon.