Last Flight Home

The falcon-worshipping Austringers have been living just fine in their secluded world atop some pretty tall cliffs on a planet called Axis Solan. However, the planet is dying, and time is short for the last warrior prince to get home and warn the king of a treasonous plot and an imminent attack from their displaced northern enemy.
But old horrors haunt the prince's path, and unlikely heroes prove themselves worthy of a king's gratitude.
The story's main action is a direct result of natural disasters that force societies to be at odds with each other. For the main character, it is also a coming-of-age story.