The Secret Adversary (Tommy and Tuppence Series) Agatha Christie Author

The bestselling mystery writer of all time. The greatest detective of the century. The romance of the Orient Express. The murder and the mystery that has shocked--and stumped--readers for the past six decades. This is Murder on the Orient Express. Christie keeps her readers enthralled and guessing to the end.-- Times Literary Supplement (from the original 1934 review)