The Sealed Citadel (Cycle of the Scour, #1)

Young Cally is an apprentice within the most unusual order of sorcerers in the known the only one that forbids its members from using their powers to kill. But after a deadly betrayal, everything he's ever known stands on the brink of being ripped apart. And that's before the demons invade. ~ From a USA Today bestselling author and Audie nominee for Best Fantasy Novel, THE SEALED CITADEL is the first in a new series following the rise of one of the greatest sorcerers of the age.