Wow. This book is so good that I wish I could rate it higher than five stars. Agatha Christie has done with this book something that I have never seen done with any mystery I have ever read in the past. I'm not going to say what for the sake of spoilers, but the impossibility of what she did is just stunning. But it makes sense.

OK, I'm probably so excited that it's hard to understand what I'm saying, but my point is this: Read the book. You'll love it.