"Fire & Blood" is a historical fiction book by George R.R. Martin that explores the history of the Targaryen family in the Seven Kingdoms. It covers events from the family's arrival in Westeros to the civil war known as the Dance of the Dragons. The narrative is presented as a fictional history, complete with illustrations and family trees. The book is divided into two parts, detailing the rise and fall of various Targaryen kings and their dragons. It provides insights into the political intrigues, battles, and key figures that shaped the dynasty, enriching the lore of the A Song of Ice and Fire series.