“Not an idiot, Reverend Daughter. A Lyctoral lock—the one that matches the Sixth House key. The grey key. Which Silas Octakiseron currently holds. Hence: picking.” “That’s impossible. How?” “You can’t know until we do it. If it works, it gets you every single note on every theorem I’ve read, in return for yours, your cooperation, and the map. Are you in?” There was a pregnant pause. As everyone had already known beforehand, Gideon’s necromancer was forced to admit that she was in. She