C. S. Lewis again employs his formidable talent for fable and allegory. The writer, in a dream, finds himself in a bus which travels between Hell and Heaven. This is the starting point for an extraordinary meditation upon good and evil. In Lewis's own words, "If we insist on keeping Hell (or even earth) we shall not see Heaven: if we accept Heaven we shall not be able to retain even the smallest and most intimate souvenirs of Hell."
