I've just finished The Fountain at Marlieux (which I think was written in 1954). The mystery is small and the detective, Inspector Belot, appears only briefly. Yet for all that I liked it. Like many French mysteries, the focus is on character and place. A celebrated Colonel, forced into retirement, returns to the village of his childhood. An old friend is distressed that his daughter has retired to a convent. The question is why? Despite the time of it's writing, the story seems set in a much older age. The setting is lovingly evoked and you'll be transported to a country village. The detecting, such that there is, is based on intuition rather than evidence. People talk and the truth comes out. It is an overwhelmingly sad story. Much of it is about the passing of time - the slipping away of childhood, the fall from grace of a hero, the loss of parents and probably, in a way, the passing of the French Empire with the uprisings in Algiers. There seems to be a far greater influence from literary fiction than English novels of the same period. A sorrowful psychological study.
I'd very much like to read further works by Aveline so will have to see what I can track down.