I was wondering about fantasy and horror novels, stories, or series in which the protagonists go to Hell. Or Hades, or Jigoku, or what have you; a tour of an actually, actively unpleasant afterlife vision. Modern authors doing Dante's Inferno. I remember Nifft the Lean, and Edward Lee's City Infernal, and I guess The Amber Spyglass too. Tanith Lee's Azhrarn rules a demonic underworld called Druhim Vanashta. And, well, there's Sartre's No Exit, but I'm interested here in elements of the fantastic, visions of extraordinary otherworlds tied in with religious systems of belief. I hope the moderators don't mind my sense of humor in titling this as I did.