Demoniality, written by Father Ludovico Maria Sinistrari in the 17th century and rediscovered centuries later, is a lost theological treatise on one of the most controversial and taboo topics in the history of religious doctrine: carnal relations between humans and demons. With chilling precision and philosophical depth, this book unpacks the nature of Incubi and Succubi—not as metaphor or delusion, but as rational, embodied, and morally accountable beings who walk among us.

According to Sinistrari, Incubi and Succubi are not simply fallen angels or figments of the imagination, but a third category of rational creature: not human, not angelic, but fully corporeal and spiritual, capable of salvation or damnation. These beings were, he claims, misunderstood by the Church and falsely grouped with demons, when in truth, they belonged to an ancient and hidden taxonomy of sentient life.

Key elements covered in this explosive text:

• A detailed theological argument that Demoniality (sex with demons) is distinct from bestiality, and constitutes its own category of sin
  

• Historic cases of demonic seduction and possession, carefully annotated and classified
  

• The classification of Incubi and Succubi as beings with bodies, souls, free will, and the potential for redemption
  

• The defense of the theory that mythological fauns, satyrs, sylphs, and forest spirits were actual incarnations of these hidden creatures
  

• The Church’s historic conflation of Demoniality with witchcraft and how political and theological pressure obscured deeper truths
  

Unlike typical witch-hunting manuals of the time, Sinistrari’s work is less sensational and more analytical. A scholar and professor of theology at Pavia, he approaches the subject with the seriousness of legal and moral philosophy, citing Aquinas, canon law, and ecclesiastical decrees. But make no mistake—what he proposes is radical, even by esoteric standards: that these hidden beings walk among us, enter into physical relationships with mortals, and even raise offspring.

Originally written in Latin and banned by the Church, the manuscript was uncovered in the 19th century and first translated into French, then English. For centuries, it remained buried—forbidden knowledge locked away from public view due to its dangerous implications.

This edition includes:

• The full original Latin text
  

• The English translation
  

• Biographical insights into Sinistrari and the suppression of his work
  

• Notes on the theological, mystical, and folkloric sources used
  

Perfect for readers of occult literature, forbidden theology, demonology, and esoteric sexuality, Demoniality is a rare, blasphemously bold document that dares to define the boundaries between heaven, hell, and flesh.