Agatha Christie omnibus.
Christie, Agatha,1890-1976.
Christie, Agatha,1890-1976.Murder of Roger Ackroyd.
Christie, Agatha,1890-1976.Big four.
Christie, Agatha,1890-1976.Mystery of the Blue train.
London : HarperCollins,
1996.
Cover title: 1920s Agatha Christie.
The murder of Roger Ackroyd -- The big four -- The mystery of the Blue train.