Five Little Pigs is yet another Hercule Poirot's story by Agatha Christie. It was first published in 1942 with different title: Murder in Retrospect.
The story follows Poirot trying to solve a murder case that happened 16 years ago; Caroline Carla was convicted of the death of his husband, Amyas Crale. Now, Carla Lermachant, their then 5-year-old daughter, asked Poirot to revisit the case once again to find the truth behind her family's tragedy. This brings Poirot to meet 5 particular witnesses of the crime; hence the title of the book.
This book is yet another display of the author's great attention in details, mainly the characters'. We get to know deeply about this book's main characters, which are the 5 witnesses. Every character tells their own version of the murder case with their own way. Within every story, there's a little bit of clue that holds the key to the case. And also some contradictions and false interpretations, which add another layers of difficulty to the case.
I personally like this book because of how I underestimated the author too early. At the end of the second act, I thought I already figured out the case through all the clues. But, then the revelation comes and, oh boy, I was wrong.
Lastly, there's also a fun little reference to the author's other book that I read recently, Three Act Tragedy, here. So, yeah. See if you can find it.