Play Book Tag discussion

I think this may be my third time reading this book and I've loved it every time. Obviously my poor brain can't seem to retain the reveal of the killer because it has surprised me every time!
This classic Christie tale involves a small island, 10 unsuspecting guests and a sinister nursery rhyme describing the demise of 10 people. The murders are accomplished so cunningly that each remaining future victim cannot decide how it was done. There is no one else in the house. There is no one else on the island nor is there anywhere to hide on the rocky formation. A fierce storm helps lend tension to the storyline as one by one the guests meet their end. Such a clever story and one that I will more than likely read again.