Shadows of the Unleashed - The World of Æor - Ravensong, #1

When a demon descended on the Kingdom of Tarquin, young Prince Jairin fled the castle to save himself from the fate that took his father and mother. The demon left behind a trail of carnage and death, destroying everything he touched. Twenty years later, Jairin has been living a quiet life among the monks in a distant monastery-until a stranger bangs on the front door, telling of a rising shadow that has destroyed the villages to the south.
Jairin and the stranger stitch together a company to reclaim the Prince's birthright, but they must deal with the demon, long hidden in the shadows, if Jairin and his company are to live finally in peace.