De Daemonialitate et Incubis et Succubis is a seventeen-century manuscript treatise by Italian Fransican Ludovico Maria Sinistrari.
The original manuscript of De Daemonialitate et Incubis et Succubis was discovered by chance by French bibliophile and publisher Isidore Liseux in London in 1872, while searching for old books at a store.
Sinistrari begins by establishing the existence of these spirits and their various manifestations, drawing from theological sources, biblical texts, and historical accounts.
[5] The treatise then focuses on incubi and succubi, elaborating on their characteristics, behaviors, and motivations.
Sinistrari's work reflects the prevailing religious attitudes of the time, which viewed sexual immorality as a significant spiritual transgression.