Incarceron by Fisher

It's the future again. There's been a big war that ended in the establishment of a monarchy. The king said the whole technology business was too complicated and decreed everything had to stay as it was in good ol'1700-ish. The people responsible for the war or deemed a stability risk were taken to Incarceron, an inorganic yet conscious prison with a nasty sense of irony. The prisoners live and die there, and so do their children. By the time of the story, no one remembers the outside world except Finn. Finn's memories only stretch back a few years, despite the fact that he's 17. He's convinced he's from the outside and tries to escape. Meanwhile, the warden's daughter Claudia is attempting her own escape from a political marriage to the queen's horrible son. As we all knew they would, the prisoner and the princess manage to cross paths.

The story is a bit bumpy. Keeping track of two separate realities will prove difficult to some readers, as well as keeping characters straight. On a side note, Fisher has some combative moments with grammar, mostly struggling with pronoun-antecedent agreement and some ungainly appositive phrases. In plain language, some of the passages are hard to read because of the way they're written.