Great suggestions, all. I'll add Bram Stoker - Dracula, Charles Dickens - all of it, Wilkie Collins - The Moonstone, Henry James - The Turn Of The Screw; Roger Zelazny, Phillip José Farmer, Robert Silverberg, Harlan Ellison, Ray Bradbury, Ursula K LeGuin, Larry Niven, Robert Heinlein, Michael Chricton, and Isaac Asimov for Sci-Fi and fantasy; Lawrence Block, Rex Stout, and Dashiell Hammett for mystery and detective fiction; and Shelby Foote for his Civil War history, which is pure poetry.