É um fato bem divulgado que a terceira temporada consiste na primeira metade do terceiro livro, e que a segunda metade virá na 4ª temporada. De fato, a melhor citação parece ser a do Huffington Post, Não espere que exista uma proporção de 1 para 1 para cada temporada, eles estão tentando manter as sagas juntas. Eu não ficaria surpreso se o livro 4/5 fosse combinado em um arco de temporada de 2-3, por exemplo. Aqui estão algumas referências e a citação do Huffington Post.
As I said in my conversation with Weiss, it sounds as though the way to look at upcoming season (hopefully seasons) of the show are as portions of the overall saga, not sections of particular books.
"Yeah," Weiss said. "A season of television needs to feel like a season of television. We have so many storylines to juggle, and they all need to ideally have a sense of a beginning, middle and end over the course of a season. Each character needs to feel like they're traveling a specific road in the course of a season, and coming out as a different person than they went in. It's never going to be about taking a book and ripping it in half -- 'At page 673, this is the place where [the season] ends.' It comes down to case-by-case [decisions] with each story and how best to serve each character's story going forward."