Yes! Roland of Gilead is very cool! I loved those Dark Tower books. I'll give you a warning though. Many, many people were disappointed by the final three novels. I was a little, but it is a terrific story. The characters make it great where the story might lack toward the end.
Also, the last book I read was Time of the Twins. I agree. Raistlin and Caramon are pure awesome.
I read a few references to Neil Gaiman. Terrific author. I recommend a novel called Neverwhere. I'm told that it's a BBC movie, too, but the movie stinks. It might have been a screenplay first, I'm not sure. Neverwhere is all about a secret world of sorts below London, England. Check it out.