Murder on board : including the mystery of the blue train, What Mrs. McGillicuddy saw! [and] death in the air - Christie, Agatha, 1890-1976. (New York : Dodd, Mead, 1974)
Keywords: Poirot, Hercule (Fictitious character) -- Fiction; Marple, Jane (Fictitious character) -- Fiction; Private investigators -- England -- Fiction; Women detectives -- England -- Fiction; Belgians -- England -- Fiction; Mystery fiction