Song of Ice and Fire

This is one of the best Fantasy series I've read since Lord of the Rings.
I've just finished reading the first three books of the series and they are great.
The story has three main threads, one follows the battle for succession for the seven kingdoms, another the land beyond the wall to the north of the seven kingdoms where mysterious creatures named the Others live and a third follows the exiled princess who's planning to return to the seven kingdoms (with three dragons) to regain her throne.
The story is fast paced and full of twists and turns that always keep you guessing.
This one is very highly recommended for all fantasy readers.