The Princess And The Queen, Or, The Blacks And The Greens by George R. R. Martin

The Blacks and the Greens

A brutal Targaryen civil war erupts when rival claimants to the Iron Throne vie for power, pitting family against family and noble house against noble house; the conflict blends ruthless court intrigue with devastating dragon-on-dragon warfare, producing betrayals, atrocities, and a legacy of ruin that reshapes the realm and the future of the dynasty.