Game of Thrones : True Dragon

Reborn as Viserys Targaryen—the once-scorned Beggar King—he awakens as the last True Dragon. What began as a life of exile and weakness becomes the spark of a revolution that will reshape the world. With dragonfire as his decree and conviction as his crown, Viserys rallies the people, tames dragons, and turns scorn into loyalty. Each victory forges his legend, until the fallen prince rises as the True Dragon Emperor—liberator, conqueror, and the hero who will stand against the Long Night. This is the story of how a broken heir reclaims an empire, one step, one flame, and one crown at a time. — Description from novelcodex.org