This is easily one of the best Agatha Christie mysteries I have read to date. As with the best whodunnits, I could envisage every suspect as the murderer and had no idea who had truly done it, but when the reveal came it made perfect sense and felt like it couldn't have been anyone else. Looking back I can see so many clues I missed. 

It read incredibly fast and I never once wanted to put the book down, I would happily have read it in one sitting. Highly recommended.