Contents: Devil and his Relation to the other Maleficent Divinities; Origins and Formation of Christian Devil; Covenant with Satan and the Mark of the Devil; Manifestations of the Devil and Power of the Sorcerers; Sabbath; Witches' Trial; Modern Devil; From Belief to Delusion; Genesis of Modern Ideas about Demoniacs; Demoniacs and Convulsionaries; Neuroses Characterized by Demonic Fantasies; Demoniacal Madness; Religious and Lay Therapy, Exorcism.