Is that the uh... series that Game of Thrones is based on?
What did you like about it and what kind of reader would you recommend it to? Because I wanted to read those before I started watching the show.
"ASoIaF" is a neat little fantasy book that's light on the fantasy and heavy on the politics. It's a good read for someone who either doesn't like fantasy, or is tired of the unashamedly tolkienesque fantasy of elves and orcs and the like. (There are
things like magic and dragons, though in the books they've been gone so long that they're basically myth.)
As Ultimatum said, there's not a clear distinction between good and bad (though the narrative very clearly labels the protagonists and antagonists early on.) What I like, though, is that the author, George RR Martin, seemed to try to stay on the more realistic side of medieval warfare, and medieval culture in general. The books focus thematically on things like class, honour, and family.
As the books go on, you get to see a war begin and progress, and it really feels like you're reading through some significant historical era in the fictional world. There are a lot of cool mysteries and the author really pulls no punches with twists.
The main problem I have with the books is that they are a huge investment of time, and they can often drag. Since they follow multiple third-person-limited perspectives, there have been many occasions where I've started reading a chapter about a character I'm not interested in, only to find that the next five chapters are also following uninteresting characters. It sometimes seems like the author has very different ideas of what makes a story and a character interesting than I do.