This book gives you the events of what happened from some time before Aegon the Conqueror came to Westeros, to the time of Aegon III. Some things are presented as clear facts and other speculations, but it still paints a clear picture of how and why things went down as they did. A lot of questions I had before have now been answered. Like why the Dragon population was so drastically diminished and how/why the Targaryen wedding customs between siblings was even accepted at all.