Against the Light — Dave Duncan

The Hierarchy, high priests of the religious order the Light, has installed King Ethan as the monarchical figurehead, ruling both the magical kingdom of Albi and its predominant religion. Scattered throughout the land, worshippers in the old ways of the Earth Mother are persecuted as heretics. And when young missionary student Rollo Woodbridge returns home to Albi, he is immediately arrested for heresy and treason, setting off a chain of events that plunges the land into utter chaos.

The Hierarchy has more treacherous motives, however, and when Rollo is rescued from jail, his family's home is destroyed -- but Rollo and his siblings are left alive. While Rollo tries diplomacy to end the religious and political conflict, his brother and sister swear vengeance. With the hours to deliverance counting down and their lives hanging in the balance, they must decide whether to stay and fight or leave Albi forever in the suspenseful, action-packed Against the Light.