I've seen several TV versions of this particular Miss Marple, and I've always enjoyed the story. I took a star off, though, for the whole Megan-Jerry romance that played out much better on the small screen - you know, when the screenplay writers obviously decided to make Jerry less condescending to Megan and play up his whole proposal to her as needing this little girl-bride he can polish up for his own. It was...very irritating. 
 I know the end where (view spoiler)[Joanna presents them with a leash as a wedding gift because she joked earlier that Megan might as well be Jerry's dog, the way he constantly talks about taking her on walks as though she's one and not a girl at all (hide spoiler)] was supposed to be a punch line, but the entire thing felt like an unequal relationship where Megan's instincts weren't appreciated by anyone BUT Miss Marple. 
 Anyway. On to the next one!