A grand hotel in the center of 1920s Berlin serves as a microcosm of the modern world in Vicki Baum's celebrated novel, a Weimar-era best seller that retains all its verve and luster today. Among the guests of the hotel is Doctor Otternschlag, a World War I veteran whose face has been sliced in half by a shell. Day after day he emerges to read the paper in the lobby, discreetly inquiring at the desk if the letter he's been awaiting for years has arrived. Then there is Grusinskaya, a great baller