Apparitions is a classic mid-1970s study of over 1800 cases taken from two separate appeals plus many others culled from the files of the Society for Psychical Research. It is a terrific, testimony-driven study that is worth the price of admission for the experiences alone. Seeing Ghosts is also testimony-driven; but weakened slightly by the inclusion of too many third-person narratives. Taken together, this is a splendid pair of ghostly studies.