The prophecy says one will unmake the other. They were both counting on it. For three hundred years, Kael Drassyn has ruled the Eternal Throne as the Undying King — his mortality stripped, his appetite gone, his patience infinite and his loneliness immaculate. He has been waiting for the vessel of the Hollow to arrive so the prophecy can end and he can finally be done. Seren Voss has been carrying a god for seven years. He came to the negotiation table with a map, a problem, and the complete inability to be anything other than exactly himself. He was not expecting the Undying King to be someone worth paying attention to. They were both wrong about what unmake means. When a conspiracy threatens to collapse the Vein — the deep energy network that breathes the world — they have four days and each other. Nothing else. The operation that follows changes the war, changes the prophecy, and changes both of them in ways that neither the god nor the empire prepared them for. The convergence they were fated for is not destruction. It is the beginning of something the world has not had in four thousand years. When Empires Burn is a dark MM romance set in a sunless world illuminated from below — where the light comes from inside the earth, the magic is the practice of listening, and the most dangerous thing two people can do is choose each other with full knowledge of what the choosing costs. For readers who want their love stories earned, their villains complicated, and their worlds built all the way down.