As of right now, the eighth and final season of Game of Thrones is still slated for release on HBO sometime in 2019. The sixth installment of A Song of Ice and Fire, the book series on which Game of Thrones is based, doesn't even have an estimated release date. But there is a release date for author George R.R. Martin's newest Westoros history book, Fire and Blood: Nov. 20. But if that's still too long to wait, Martin has you covered: with a new excerpt from the book, via his own website.
Fire and Blood is an illustrated (by Doug Wheatley) history of the Targaryens in Westoros, written from the perspective of one Archmaester Gyldayn. The excerpted chapter deals with Alysanne Targaryen, wife and sister to the fourth Targaryen king, Jaehaerys I. Set centuries before the Game of Thrones series, Alysanne heads north for the first time, making contact with several Starks, and with the Night's Watch at Castle Black.
The Hollywood Reporter says that the Ice and Fire books are more character-driven, whereas Fire and Blood is more like a traditional history book: academic, objective, and less emotional. It is meant to be the first of two complete histories of the Targaryen clan.
One can only assume/hope that, if this book is successful, more volumes of definitive histories could come down the pipeline: the Starks, the Lannisters, the Baratheons, the Tyrells.... But before Martin focuses on that, why don't we let him finish his next book in the A Song of Ice and Fire series?