How many novels did the detective who helped Antoinette Marceau on the Murder on the Orient Express appear in?
Agatha Christie: Murder on the Orient Express:  She is aided by famous detective Hercule Poirot. Hercule Poirot:  Poirot is one of Christie's most famous and long-lived characters, appearing in 33 novels, one play ("Black Coffee"), and more than 50 short stories published between 1920 and 1975.
i don't know