THE CLASSIC STUDY OF ESP AND GHOSTLY APPEARANCES What are ghostly apparitions? In this classic of psychical research, George N. M. Tyrrell submits that 'ghosts' are subjective and telepathic, created in the regions of the personality outside the field of normal consciousness. Basing his theories on a vast collection of psychical data, and substantiating his arguments with more than sixty dramatic, well-documented case histories, he establishes a clear relationship between the phenomena of sensory hallucinations and modern psychology. His is a logical, impartial exploration of a subject long obscured by fear and too often dismissed as belonging to the realm of the 'supernatural.' As past president of England's famed Society of Psychical Research, Mr. Tyrrell demonstrates with authority that the scientific investigation of apparitions can make a significant contribution to our understanding of the human mind and personality.