I really enjoyed this book. Agatha Christie steps out of the usual expected murder case and turns it into an exciting tale of intrigue and mystery where Hercule Poirot takes on a World Domination organization simply known as "The Big Four".

Each of the four members is referred to by a number.

Number one stands for power. He is one of the most powerful people in the world, although no one knows it. He's always behind the scenes pulling strings.

Number two stands for money. He is pretty much the richest person in the world and funds all of their projects.

Number three stands for western science. Number three is one of the worlds most famous scientists and is above suspicion from everyone.

Number four is simply "the destroyer".

He is like the executive branch for the group. He does the killing. And he looks different every time.

Number four is who Poirot has the most trouble with. No one knows who he is, what he looks like, or where he will strike next.

This book has a perfect balance of adventure and mystery. It is narrated by Captain Hastings.

(Note: This review was written when I had not read very many of Agatha Christie's books. Upon rereading, I am less enthusiastic about it as I was then, having experienced so many that are better)