Cody is seventeen, enrolled at Trestfall’s Academy, and doing things in the practice room that alarm his instructors in ways they are too professional to show. His gealdorcraft — the tradition of declarative, forceful magic associated with the old kingdoms — is advancing well beyond what his training should have produced. An elderly Highmage named Aldwen Tace has come from Velmoor specifically to observe him. Nobody will explain why.

Ben has advanced. The decision was private, painful, and made on the frontier road alone — he crossed from hedge wizard to wizard in the fall, and the crossing cost him something he is still trying to identify. He is in Trestfall, taking instruction he resents from a teacher who is correct, and asking himself the question he has been afraid of: am I still the person I was?

In Caldrath, a man named Cassin — the architect of the forced labor convoys that have been rounding up frontier citizens for the new industrial sites — sees a face through the slats of a passing wagon. The woman is not frightened. She is furious. Cassin sits with this for three hours and does not open any of the work on his desk.

In the city of Velmoor — beautiful, ancient, hierarchical — a lean man in merchant’s clothes is moving through the right rooms, asking the right questions, and making things run just a little more smoothly for people whose ambitions align with Caldrath’s. He has been in the world for three months. Something about him is wrong in a way that trained practitioners can almost name. Almost.

THE FURNACE CITIES is the darkest novel in The Unsettled Lands. It is the one where Cody navigates two magic schools — the rough meritocracy of Trestfall and the gilded hierarchy of Velmoor — and discovers that both will fail him before it’s over. The one where Ben watches his former apprentice do things he was never taught and cannot do himself. And the one where Ben finally tells Cody the truth that has been sitting between them since a water trough in Harrow’s Ford lit up blue-green three years ago.