A prequel story about the young woman who'd some day become the Obscurist Magnus: Keria Morning ... and mother to Scholar Christopher Wolfe. Keria's world is the Iron Tower, though she longs to fly beyond those walls and away from the hothouse intrigues of all those trapped with her. But her world is about to be turned upside down by the arrival of a new, unwilling Obscurist. Set in the world of The Great Library.