The Divine Deucalion of Aether

Book 1 in the Aether tetralogy. High fantasy story set in a world taking inspiration from the civilizations that existed from 500,000 BCE to 1697 CE, with there being some exceptions. Our protagonist Falco, is the prince of Aether and son of the Divine Deucalion, who must face the would-be usurper Taurus, High Priest of the Earth Bull.