Probably a Storm of Swords, which is like 1100 pages or something.
I've also read the whole Lord of the Rings trilogy (twice) and Harry Potter series (multiple times). I can't sleep unless I read a bit of a book or watch half an hour of a movie/tvshow beforehand.
I'm really done with long books though. Taking me forever to get through Dance with Dragons.
Harry Potter has to be the best one out of that set, it's the fastest moving/not verbose/descriptions are not overly detailed. Better than the movies. I really hate the first book though, and have only read it once.
I have no idea how I read LOTR when I was like ... 12. A lot of skimming rather than reading, because it DRAGS on, the descriptions are so overdone. I don't care to read the lyrics of every song they sing... but you can skip whole pages and not miss any important parts. I don't know if I prefer the books or the movies...
Game of Thrones has an extremely detailed plot that never ends and the non-stop barrage of new characters/character deaths angers me. First three books were okay. Past that.. would not even recommend reading it... just stick to the TV show.
