In this book C.S. Lewis again employs his formidable talent for fable and allegory. The writer, ina dream, boards a bus on a drizzly afternoon and embarks on an incredible voyage through Heaven and Hell. He meets a host of supernatural beings far removed from his expectations and comes to significant realizations about the ultimate consequences of everyday behavior. This is the starting point for a profound meditation upon good and evil. "If we insist on keeping Hell (or even earth) we shall not see Heaven: If we affecpt Heaven we shall not be able to retain even the smallest and most intimate souvenirs of Hell."