This 17th century treatise on demonology, written by the respected theologian, Catholic priest, and exorcist, Rev. Father Sinistrari, examines a particular class of spirits known as the incubus and succubus. These minor demons crave sex and often attack their victims while they sleep. Though incubus and succubus are considered less dangerous than possessing demons, they can be relentless in pursuit of their desire and grow violent when resisted. Demoniality advances novel theories about occult biology, claiming demons can reanimate corpses to have sex and impregnate victims with demonic seed to produce offspring who are 'tall, hardy, bold and wicked.' An expert on witchcraft and sexual sin, Rev. Father Sinistrari included sections on related phenomena, including: bestiality, necrophilia, demonic pacts, witchcraft, witches' marks, devil worship and magical beings such as fauns, centaurs and elves. Father Sinistrari was a learned Franciscan Friar who used deductive reasoning to examine
