The Pale Horse

This is an example of a mystery with the all the right elements that isn't executed well enough. I am three-quarters of the way through reading all of Christie's mysteries and this one came up short. Not only did I guess the murderer a quarter of the way into the book, I also rolled my eyes more times than I could count.

What if you could make someone die just by willing it? What if science advanced enough for our brainwaves to combine with sound waves so that we could kill each other with our minds?

If that sounds at all ridiculous to you, get ready because sentiments such as these are what you will be reading the entire book. All of the puzzle elements of the mystery are replaced with superstitious mumbo jumbo telling of the time, reminding you of how they used to hide under desks under threat of nuclear bombs.

In the end, the solution is the obvious one. The one you have been muttering to the protagonist since the beginning, but he's too caught up in his fear of MAGIC that he doesn't see what is right in front of him.

That said, it probably would make a better movie. It's very theatrical.

Update: Prime did make a film adaptation and, yes, I enjoyed it better than the book. Actually, I have enjoyed all of their Christie adaptations.