Getting Happy with Parker Pyne: The Case of the Discontented Soldier by Agatha Christie

Yes, we have another Christie detective to meet! But is he a
detective at all? Let's explore this question along with an
unfortunate "stuck in its time" element we were not expecting in
this, the short story that introduced Ariadne Oliver to the world.
At the very least we can say that Mrs. Oliver emerged fully-formed
from Christie's head, clothed in all her self-deprecating,
no-nonsense glory. (Perhaps she should have been named Athena
Oliver?)