Murder in Mesopotamia (1936) is set at an archaeological excavation in Iraq.
Hercule Poirot happens to be close when an astonishing (far-fetched) murder occurs.
It’s typical Christie. A cast of characters all of whom MIGHT be the killer. A surprise ending.
I liked best Nurse Amy Leatheran who tells the tale.
Click PLAY or watch a snippet of a TV adaptation on YouTube.