I've never read any mysteries, so I thought I'd start with the best. Some reviews said this one was it. Of course, I'd heard of Christie.

I expected a great mystery, which this is. But I did not expect how great of a writer she was! The book bounces between the thoughts of 10 people right from the beginning. The repetition of their thoughts only helps to establish the setting. The rest of the book continues this way, bouncing between characters, revealing their fear and guilt. Each character different, yet in the same position. Artfully done.