"To the other Darrow," says Kell, his chin trembling as he says, "To the other Kell. She says he's training her, that together they can summon the magic to go home, but it's madness."

Kell pushes an arm beneath his eyes. "That sort of magic takes years to learn. I'm not afraid to teach her. I'm afraid she'll take on too much, and now she has. And she - she wants him."