I listened to this as an audiobook, which made it a bit harder for me to keep track of the characters. I usually try to crack Agatha Christie's mysteries, and it's easier for me to remember suspects and clues when I read a book visually. The audio version was splendid, however! Really well read-- I had a little chuckle from time to time at the witty and proper word choice by the characters. I have yet to solve an Agatha Christie murder mystery though! (view spoiler)[the added details at the end did indeed make it impossible for me to have solved it anyways. I certainly didn't see it coming! (hide spoiler)] I like Miss Marple, she's a cool character. I'm pretty impressed that Christie wrote so many strong female characters, it's refreshing to read and she was certainly ahead of her time as a writer. 
 My favourite Agatha Christie book at this point is still Murder on the Orient Express, but I certainly enjoyed this one as well!