The Great Divorce, by C.S. Lewis

The Great Divorce. In a dream, the narrator 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, from the disgruntled, ghostly inhabitants of Hell to the angels and souls who dwell on the plains of Heaven. This powerful, exquisitely written fantasy is one of C.S. Lewis's most enduring works of fiction and a profound meditation on good and evil.