Hammer of Amahte': Book One of the Triumvirate Trilogy (E. Pub)

It is a dark time. For centuries after the first seed ships spawned human civilizations on countless planets, three worlds - the Triumvirate - reigned supreme. But now the Triumvirate stands on the brink of collapse after a brutal decades-long war. As empires crumble, a small group of people make a discovery that could alter the course of the war and forever change humanity.