The novel is about a psychotherapist, Dr. Peter Howard, a clinical psychologist, who goes crazy while in psychotherapy himself, according to the psychiatrist who is his therapist in a post doctoral training program. As the story unfolds, after Dr. Howard's hospitalization the psychiatrist, Victor Myerson, M.D. published a book about his case, entitled The Case of Peter X: A Model Case of Paranoid Schizophrenia with Delusions of Grandeur. Peter Howard then reviews his psychiatrists book in the New York Review of Books, in three parts, with a confession in part one that he is, in fact, the patient referred to in Dr. Myerson's book.
After the review causes quite a stir because he very articulately argues, that although he was in fact crazy, just as his shrink said, he was also really talking to the spirit of Christ (The Eternal Split-Second Sound-Light Being), and says what Christ told him.
The two psychotherapists then meet to "dual" (pun on dualism) it out on The Dick Cavett Show. Cavett gets to interview both the Christ and the Devil, and their answers will both shock and entertain you.
In the end, the novel artfully shows us that dualism is merely a communication device that we often lose control of. There is no such thing as good and evil in the world of reality. Only suchness - such as it is. And power comes from alignment with what is so.