A young woman approaching him with a problem is nothing new to Monsieur Hercule Poirot, but what is new is that she wants him to investigate a murder that occurred 16 years ago. It seems that in a famous murder trial, her mother was found guilty of murdering her father, and the young woman wants the great detective to find out the truth of the case. It is a challenge most difficult, one that Poirot cannot refuse!
Overall, I found this to be a pretty good book. It is a good, solid Hercule Poirot mystery. It does, sadly, have several rather debilitating problems. First of all, the author keeps Monsieur Poirot's interaction with the other characters to a minimum, allowing most of the evidence to be presented to him in written form. This does tend to limit the main character's ability to shine in the story.
Secondly, I must confess that I found the ending rather anticlimactic and unfulfilling. Yes, I am sure that it was the most realistic way to have the story end, but that does not mean that it was the most interesting way to end it.
As an Agatha Christie fan, I must say that I am glad to have read a Hercule Poirot story that I have never read before. But, I wasn't thrilled with it, and I doubt that I will ever read the story again.