Well, what the fuck do you expect when you walk into Satan's closet?
Anyways, I had to read The Mysterious Stranger for a third year english fiction class I pretty much figured would be easy credit (worst decision ever unless you want to hear about how Dracula is really all just about blowjobs and anal sex). I don't really remember it being anything like that at all, except for Satan being involved and some existentialist stuff.
I don't think it was ever really finished though, and the version I read was pieced together from a few different works that he never finished, so this could be one of those on it's own.