I'm looking for a book (YA fiction, I think) I read aboooout 5-7 years ago from the library, and now I can't find again. In classic style, I know very little about it, but I do know the following:
• There were two main characters: one male, one female. I think they were about the usual YA Character Age (16-18) but I'm not sure.
• The male main character lives in these underground tunnels, but finds his way to the surface...
• Where the female main character is, in some sort of formal society. I remember it was winter, I think. It was cold, at least. She'd been trained in poison use, I think?
• The book ended with a female relation (I think) or friend of the female main character, strapped into a machine that was supposed to summon a dragon somehow. There are no dragons appearing in the book prior to that time.
• The cover was dark. I think the title was one word.
• The book was standalone, and not (as far as I know) part of a series.
I tried searching WorldCat, but with little success. Anyone know what this is?