The mystery was perfect. Poirot was marvelous. The suspects are all terrific liars. The side-kicks suitably confused, just like I was, and the solution (view spoiler)[ unsettling. 
 This is where my review is going to focus. It's such a popular book that just about everything has been said that can be said. It's a fun mystery, and she does a very good job of working up sympathy for the perpetrators. Still, their solution to injustice was private vengeance. Not one of those people could be said to be impartial; which I think is the first rule of being a juror. There's really no difference from an old-west lynch mob. What unsettled me the most though were the actions taken by the conductor, the doctor, and even Poirot to cover it up. I like my mysteries to have a more satisfying conclusion. 
 Christie's works are pretty hit or miss for me. I dislike some, some are okay, and some are terrific. This one I didn't really care for. (hide spoiler)] 
 I do have to say I was heartily disappointed even disgusted over one point. I read Christie's works because they are usually pretty clean, almost cozy, mysteries. While the language was fairly clean, there were 4 -5 words or phrases I crossed out. I've come to expect that from her works. Don't like it, but that's how she wrote. What surprised me was the completely unnecessary allusion to a character's lewd thoughts. Oh, there were no details, but it still distracted me from the story. Well, now my book is bowdlerized, and I can feel free when I share it with my friends.