The Door Into Fire

Herewiss is the only man in centuries to possess the Power of the blue Flame, but he can't use or control it -- not even to help his dearest friend, Freelorn, exiled prince of Arlen. Herewiss does have a talent for more mundane sorcery, and (aided by the unearthly creature Sunspark) he uses it to rout the armies besieging Freelorn. But now Herewiss faces a devastating choice.
His time to master the blue Fire is running out. Should he join Freelorn in his fight to regain his kingdom? Or should he seek out the ancient keep in the Waste where doors lead into other worlds -- perhaps even the door whose use will teach him to control the Power that he must master or die?...