From the cover blurb:
In the far future, it has become possible in advanced psychotherapy for a man to be given dreams as vivid as reality in which he may play any part he chooses. If that man were inclined to see his life as a struggle between good and evil, and if he were blessed with a profound sense of the black humor inherent in his situation, he might choose to play the part of Jesus, called the Christ. If he were inclined to write a book, it might be this one.Review:"It's a novel that turns the reader everywhichway -- inventive, funny, intriguing. The idea of a person getting therapy by taking the place of Jesus in the Bible -- with all the conflicts of a modern man overlaid on the past -- is quintessential Malzberg, brilliant and thought-provoking. I enjoyed the hell out of it." - Gregory Benford