"The Phantom World" by Augustin Calmet is a comprehensive and scholarly work that explores the topic of apparitions and supernatural phenomena. Written in the 18th century, the book examines various accounts of ghosts, spirits, and other mysterious occurrences, drawing upon historical, religious, and philosophical sources. Calmet provides critical analysis and explanations for these reported phenomena, aiming to separate fact from fiction and dispel popular superstitions. "The Phantom World" is a significant work in the field of paranormal studies, offering readers a fascinating insight into how such phenomena were perceived and understood during that era.