Every time I finish an Agatha Christie book I am angry at myself for waiting until my 30's to discover her books. I had been introduced to her characters earlier, in the form of David Souchet's portrayal of Hercule Poirot in the BBC/Mystery productions. I was not disappointed by this book. It was an excellent mystery, and though I knew the plot before I read it, I was surprised at the twists and turns and the process it took to get to the well-known ending. I must add more Christie to my to-be-read-list.