I always enjoy the quality time I spend with Monsieur Poirot, but although I listened to the end of this novel three times, there are still 1.5 details I cannot figure out. I can't tell if Christie was trying to be delicate or mysterious by not providing a thorough explanation or if she just figured it would be obvious, but I don't quite get it. And there seem to be an awful lot of extraneous characters in this one, too. Not a fave for me.