A scientist casts new light on psychic phenomena, such as clairvoyance, telepathy, and 'out of body experiences'. He presents an exciting new theory which explains such phenomena, linking the recently discovered 'Shadow Matter' world of physics with parapsychology. It replaces notions of the occult with important new ideas that are figuring in physics (even in recent television programmes). The book contains case histories, showing how this new theory could account for telepathy, clairvoyance, 'out of the body experiences', and apparitions of the living and the dead in terms of Shadow Matter. It also explains how Shadow Matter theory could account for the survival of the human personality after death of the body. The author builds on theories until now discussed only in academic journals. This theory was first published in brief outline in the journal Inquiry in 1988. It develops the concept of the Shadow Matter world introduced in the journal Nature in 1985. Suitable for general readers interested in new developments in science; general readers interested in parapsychology and the occult; specialists and scholars, especially in physics, chemistry, biology, psychology, philosophy and medicine.