/lit/ - Literature

I'm looking for some (non-pornographic) books that involve a romantic relationship between a human male and non-human female as a substantial plot point. And when I say non-human female I don't mean "a human with pointy ears that lives a long time" or "alien that looks exactly like a human but has wrinkles on their nose so that makes them actually an alien", I mean a dragon or a werewolf or Lovecraftian tentacle beast or a sentient spaceship or something. I'm currently reading Mercedes Lackey's "Obsidian Trilogy" on the basis that the generic chosen one boy hero winds up in a relationship with a demon girl that looks sort of like a tiefling, which could stand to be a bit more monstrous, but at least she couldn't be mistaken for a human, what with the horns, hooves, and red skin.