Posthumous Humanity Or a Study of Phantoms is a book written by Adolphe D'Assier. The book is a study of the phenomenon of phantoms and ghosts, and explores the idea that these apparitions may be evidence of the survival of the human soul after death. D'Assier examines various cases of ghost sightings and paranormal experiences, and draws on scientific and philosophical theories to explain these phenomena. The book also delves into the history of...