Following the Cathedral of Light's unexpected defeat in the Burning Hells, Reverend Mother Prava has returned to Kyovashad broken, with doubt clouding her mind. Lacking guidance from her patron, the Reverend Mother turns to scholarly pursuits as she heals her body and soul, learning all she can from Sanctuary's varied denominations... even as a corruptive force begins to grow from within her own.

Direct from the Diablo (R) development team and award-winning author Matthew J. Kirby, this immersive tome with dazzling, all-new illustrations showcases the belief systems that have taken root in Sanctuary over eons. From the Cathedral of Light to the cult of the Triune, Prava's exploration reveals how the power of faith can steer one's destiny, or that of all humanity.

Matthew J. Kirby is the critically acclaimed author of more than a dozen novels for teens and young readers, including The Clockwork Three, Icefall, A Taste for Monsters, and the Assassin's Creed series Last Descendants, as well as Geirmund's Saga, an original story connected to the world of the Assassin's Creed game Valhalla. He has won several awards, including the Edgar Award and a PEN Center USA Award, and his books have been selected by the Junior Library Guild and the American Library Association for their lists of best fiction for young adults. He and his family currently live in Idaho.