I'm on book 5 "A Dance with Dragons" George R R MArtin. Easily the best series I've ever read... Many parts read like poetry but you actually get it, and its brutal.
Yeah I read the book a few years ago, but it seems like the first part of the movie is build up where the book (if I remember correctly). Just throws you into the craziness with 50 different perspectives and not a whole lot of character development.