R.War.

Galva—Galvicha to her three brothers, two of whom the goblins will kill—has defied her family’s wishes and joined the army’s untested new unit, the Raven Knights. They march toward a once-beautiful city overrun by the goblin horde, accompanied by scores of giant war corvids. Made with the darkest magics, these fearsome black birds may hold the key to stopping the goblins in their war to make cattle of mankind.

The worst of rivals, closest of friends, the two most wanted men in a war-torn world: Kandri and Mektu Hinjuman have cheated death so often it's begun to feel like a way of life. But nothing has prepared them for the danger and enchantment of the Ravenous Lands. This sprawling, lethal desert is the brothers' last hope, for they have killed the favorite son of Her Radiance the Prophet, and her death-priests and magical servants are hunting them.