Death on the Nile: Hercule Poirot is on holiday in Egypt on a Nile River cruise. Among the other passengers is Linnet Ridgeway, a rich, beautiful heiress honeymooning with her husband, Simon Doyle. Doyle was engaged to Linnet's best friend, Jacqueline de Bellefort before he met Linnet and broke it off. Heartbroken and wanting revenge on her former friend for stealing her fiancé, Jacqueline started following them everywhere they went. When Linnet gets killed, Jacqueline is the apparent suspect...or she would be if she didn't have an ironclad alibi, being in the presence of two other people at the time that Linnet was killed. So, who did it?
The thing about Agatha Christie is she really enjoyed playing with the mystery - making the killer the most unlikely person. And then, when you think you've figured her out, in Death on the Nile, she makes the killer the most likely suspect that you dismissed as too obvious. The most accurate adaptation to the spirit of her work might be to start with the familiar set-up but alter the clues subtly so that they point to someone else entirely in the end. For instance, the nurse was alone all night with the unconscious woman - the nurse could quickly have snuck out and done the murder.
The ABC Murders: Often considered to be one of her best works. Agate Christie's 1936 novel: Hercule Poirot has received a letter after retirement, daring him to solve a case before a victim for every letter of the alphabet is killed (and it's not a spoiler title). Poirot notes that they are not in a Sherlock Holmes story, and the killer was not so considerate as to smoke a cigarette that could be identified from the ashes at the crime scene and then step in the ashes with shoes bearing a unique tread pattern.
The general reaction to the 2018 BBC adaption is that it makes a lot of changes to the material for the sake of being darker and edgier, which is unnecessary, like getting rid of Inspector Japp and Captain Hastings and making it so bleak. And that's not even getting into the replacement of Poirot's iconic moustaches with a generic-looking goatee beard. I'm not one for nitpicking facial hair, but I think people were being too harsh with the series.
Five Little Pigs: Sixteen years ago, Caroline Crale was convicted of the murder of her husband, the painter Amyas Crale. Their daughter approaches Hercule Poirot to investigate the case. Poirot visits the five people present at the time of the murder, and each of them gives a slightly different story.
I love Christie's use of the Rashomon effect in this mystery. Poirot pieces together what happened by hearing the accounts of the five main witnesses to the crime. These accounts differ due to the tellers both needing to have a complete perspective on what happened and due to them frequently. I especially adore the unreliable narrator trope, which was used to affect this story significantly. Poirot pieces together what happened by hearing the accounts of the five main witnesses to the crime. These accounts differ because the tellers must have a complete perspective on what happened and frequently conceal information for their purposes.