I love these books. I've read them all in less then a month. The sucky thing about getting started up in a series that started in the 90s and has an average book release of about 3 years sucks though. I gave up on the Wheel of Time and Sword of Truth series just because of this. It's easy to read book after book, but then you hit a fucking wall.
Same thing happened to me. I'm thinking I might wait until he's finished before reading on. Doing the same with Wheel of Time. Both awesome series though, especially Game of Thrones. Gotta love all of the kinky sex too. Have you read "The Way of Kings" of by Sanderson? I made the mistake of finishing it already and then realized that it's probably gonna be 10 or 15 years before the series is finished. It was a great book but obviously need to hold off on the others or be frustrated for years to come.