Inferno by Larry Niven and Jerry Pournelle. The novel is both entertaining and thought-provoking. An SF writer dies and goes to what seems to be Hell, which is just as Dante described it. Naturally, being an SF writer, he thinks that it can't really be Hell, but must be being run by aliens of enormous power for some strange purpose of their own. Naturally, this being a novel by Niven and Pournelle, the reader goes along with that assumption too. It gradually becomes apparent that we're wrong.