Casablanca - it's a great movie that everyone should see
Or a little more obscure for today's generation.. A Place in the Sun (Montgomery Clift, Shelley winters, Elizabeth Taylor) this movie was based on Theodore Dreiser's book, an American Tragedy..
Or Alfred Hitchcock's Rebecca - based on the book Rebecca by Daphne DuMaurier - good book, good movie, movie differs from the book because Laurence Olivier was in thelead role as maxim dewinter - and well the real ending i don't think he'd play