Blood of Heroes: The Ember War, Book 3

A peaceful planet needs a miracle to survive an alien onslaught. It's got the Strike Carrier Breitenfeld.

The Xaros, a galaxy-wide scourge of murderous drones, have their sights set on the planet Takeni. Captain Isaac Valdar volunteers his ship to defend the innocent civilians and evacuate everyone he can. Pressed by an alien fleet in space and a horrifying foe on the surface, the Breitenfeld must risk everything to save the doomed populace.