Collin de Plancy's 1818 Dictionnaire Infernal is a groundbreaking document of witchcraft, pagan religions, the occult, and manifestations of magic. It details beings, books, deeds, superstitions, and beliefs from divination and occult sciences to folktales and errors. A valuable reference consulted by authors such as Victor Hugo, it is an indispensable resource for anyone studying demonology.