A bizarre science fiction novel. It's kind of a hard-boiled detective story, set in a city which has some kind of rift to a dangerous, dreamlike place. The story focuses on a guy who escorts people into this area, and a detective investigating anomalies coming out. There's a background of crazy advanced technology, too, which means even some of the stuff that's normal to the characters is strange to the reader.
It ends up being a meditation on humanity, I suppose, but without the lack of story that would often imply.