Fire and Blood: 300 Years Before A Game of Thrones

Set 300 years before the events in A Song of Ice and Fire, Fire and Blood is the definitive history of the Targaryens in Westeros as told by Archmaester Gyldayn, and chronicles the conquest that united the Seven Kingdoms under Targaryen rule through the Dance of the Dragons: the Targaryen civil war that nearly ended their dynasty forever