Antoine Augustin Calmet's "Treatise on the Apparitions of Spirits and on Vampires" is a comprehensive exploration of supernatural phenomena in the 18th century. Written in a scholarly and logical style, Calmet examines various accounts of ghostly apparitions and vampire sightings with a critical eye, dissecting the folklore and superstitions surrounding these mysterious occurrences. Through detailed analysis and rigorous research, he seeks to uncover the truth behind these spectral manifestations, shedding light on the cultural beliefs and societal fears of his time. This treatise serves as a valuable primary source for understanding the belief in supernatural beings during the Enlightenment era. Calmet's meticulous approach and erudite writing make this book a fascinating and informative read for scholars of history, folklore, and the occult. Antoine Augustin Calmet, a French Benedictine monk and theologian, was known for his extensive scholarship in the fields of biblical exegesis and hagiography. His interest in the supernatural led him to compile this treatise, drawing upon his theological background to analyze reports of ghostly apparitions and vampire lore. Calmet's rigorous investigation and critical thinking make this work a groundbreaking study in the realm of paranormal phenomena.