The original incarnation of Arya Stark originates from this book. As the Game of Thrones TV show is based on this book, most of Arya's moveset, quote, and website description references also come from this book. A lot of the locations and characters that are mentioned by Arya or other Fighters (such as King's Landing, The Stark family, The Mountain, The Hound and Syrio Florel) also originate from this book.
Maps:[]
The Throne Room Map is based on the great hall, which originates from this book.
A gigantic replica of a war horn from this franchise appears on the Trophy's E.D.G.E. Maps. War horns first made their in-universe debut in this novel.
The Frey Pie that is referenced in one of Arya Stark's Passive Abilities comes from an episode of Game of Thrones' 6th season which in itself is based on the "Frey Pies Theory" that originates from this book.