Miss Marple Mysteries Series Books 11 - 14 Collection Set by Agatha Christie:

At Bertram’s Hotel:
Impeccable service. Luxurious rooms. Eccentric guests. There are worse places for Canon Penny father to find himself stranded than Bertram’s Hotel. But when he gets his dates in a muddle and attempts to travel to Lucerne a day too late, he unwittingly sets off a violent chain of events. And Miss Marple is convinced there is more going on than meets the eye.

Nemesis:
When Miss Marple receives a letter from the recently deceased millionaire Jason Rafiel, she’s not sure what to make of it. Knowing her deductive skills, he challenges her to solve a crime. If she does so, she will inherit £20,000.The only problem is that he has failed to mention who was involved, or where, and when the crime was committed. Jane Marple is intrigued.

The Thirteen Problems:
On a quiet Tuesday in St Mary Mead, a group of friends gather for dinner.A policeman, a clergyman, a solicitor, an author, an artist, and an unassuming lady with a shrewd gaze – Miss Jane Marple. Conversation naturally turns to crime. Each recounts a seemingly unsolvable mystery. Each thinks they know the answer. But it’s the one they least expect who understands the true nature of each wicked act…

Miss Marple’s Final Cases:
An unknown wounded man in a church. A fatal riding accident. A corpse and a tape measure. Whether in St Mary Mead or further afield, there is always much wickedness lurking below the surface, should, like Jane Marple, you have the eyes to see it. Published posthumously, this collection of tales, seven of them featuring Agatha Christie’s much loved Miss Marple, plus two stand-alone stories, is a treasure trove.