Three Act Tragedy (1935), Death in the Clouds (1935), The A.B.C. Murders (1936), Murder in Mesopotamia (1936), Cards on the Table (1936), Dumb Witness (1937), Death on the Nile (1937), Appointment with Death (1938), Hercule Poirot's Christmas (1938), Murder is Easy (1939) and And Then There Were None (1939). The Second World War did