I finished up the third book in Martin's Fire and Ice Series and am now into book four: A Feast for Crows. The third book was really amazing. He has a knack for surprising you with a turn of events, while at the same time making it seem completely reasonable.
I'll be sad to finish up this one, because then I have to wait years for the series to be finished. And he only covered half the characters from the previous three books in this one, so I really want to know what happens to them!