Robert Silverberg has been writing science fiction for fifty years. Among his many books are such novels as Dying Inside, Lord Valentine's Castle, The Book Of Skulls, and Nightwings, and he has had more than five hundred short stories published as well. He is a five-time winner of both the Nebula award and the Hugo award. In 2004 he was awarded the Grand Master Nebula of the Science Fiction Writers of America, science fiction's highest honor.