Vault of Heaven Ser.: Trial of Intentions (Vault of Heaven) by Peter Orullian...

The gods who created this world have abandoned it. In their mercy, however, they chained the rogue god--and the monstrous creatures he created to plague mortalkind--in the vast and inhospitable wasteland of the Bourne. The magical Veil that contains them has protected humankind for millennia and the monsters are little more than tales told to frighten children. But the Veil has become weak and creatures of Nightmare have come through. To fight them, the races of men must form a great alliance to try and stop the creatures.