Another good entry in the Poirot series by la Christie. I found this a remarkable one, since for the first time I figured out who committed the murder before Poirot did himself (at least, in the story). :-)
It strikes me however how very much her storylines rely on the particularities of society so typical to the era they are written in. The position of women, the reliability of promises, the pose one needs to hold in public, etc... To me, this adds an interesting layer into Christie's books as it kind of allows me to immerse myself into the world my grandparents grew up in.