Publisher's Synopsis
Swann shows how advances in science have placed the apparitions in a more intriguing light. One of the historic challenges concerning them was how could something which was not there be there in a way that registered on the eye mechanisms? The discovery of holography, where images that appear to be three-dimensional, having bulk, shape and mass, can be photographed, have provided an analogy that enlarges our perception of the physical laws and challenges the skeptics' verdict of hallucination.