if you like fantasy-- Frank Herbert's Dune is a total classic and totally freaking awesome.
anything by chuck p. (fight club, invisible monsters, choke, etc.) is really good. also, bret easton ellis (rules of attraction, american psycho) is literary heroin. "the stand" by stephen king is my second fave read of all time - number one being to kill a mockingbird by harper lee. if you havent read that one you should get a framing hammer and hit yourself in the face with it. then read it.
