<p>In a world where an industrial revolution is powered by magic, Tyen, a student of archaeology, unearths a sentient book called Vella. Once a young sorcerer-bookbinder, Vella was transformed into a useful tool by one of the greatest sorcerers of history. Since then she has been collecting information, including a vital clue to the disaster Tyen's world faces.<p><p>Elsewhere, in a land ruled by the priests, Rielle the dyer's daughter has been taught that to use magic is to steal from the Angels. Yet she knows she has a talent for it, and that there is a corrupter in the city willing to teach her how to use it—should she dare to risk the Angels' wrath.<p><p>But not everything is as Tyen and Rielle have been raised to believe. Not the nature of magic, nor the laws of their lands…and not even the people they trust.<p>