Peril's Gate (Wars of Light and Shadow, Book 6)

Plot

On the world of Athera, the fate of all realms hangs on the resolution of the brutal conflict born of prince against prince. Branded a minion of evil -- escaping the death sentence imposed by his half-brother Lysaer and his Alliance of Light -- Arithon, Master of Shadow, now faces the last choice remaining to him in the merciless winter wilds: to cast his lot with a renegade enchanter whom Arithon dares not trust ... or die by the swords of fanatical enemies.