Crimes do Coração

Her clever misdirection and subtle hints are legendary, but I'm curious how she planned the puzzle so perfectly. Did she map out all the clues beforehand?

There are layers of deception and hidden agendas that add depth. I wonder if Christie intentionally gave her characters ambiguous motives to heighten the suspense.

The confined, tense environment really amplifies the suspense. Was the setting based on a real place or more of a fictional creation to serve the plot?