A novel by Victor Wartofsky
A Psychical Research Institute needs a volunteer to penetrate the veil of death, bringing back first-hand confirmation of the existence of an afterlife. Wayne Farley has his own personal, tragic reasons for participating in the experiment. But whether it succeeds or fails, Farley's involvement will mean the loss of his life, and possibly of is immortal soul as well.
Used availability for Victor Wartofsky's The Passage
June 1980 : USA Paperback