The ABC Murders: Poirot Faces a Serial Killer

Hercule Poirot has been challenged by a man who seems to be a homicidal lunatic on a killing spree. So far, Poirot has solved countless closed-room mysteries, but facing a relentless outside threat is entirely new territory for him. Just how many murders will it take before Poirot can stop this madman?


  • Case File: The ABC Murders
  • Author & Year: Agatha Christie (1936)
  • The Detective: The meticulous Hercule Poirot
  • Sub-Genre: Golden Age Mystery/ Serial Killer Thriller
  • Fair-Play: Yes
  • My Verdict: 4.5/5 Magnifying Glasse 🔍🔍

The Plot

It begins when Poirot receives a letter challenging him to a crime in Andover on a specific date. Everybody considers it a hoax, but Poirot’s intuition makes him deeply uncomfortable. Sure enough, Mrs. Asher is murdered on that exact date and place, with an A.B.C. railway guide left behind as a calling card.

Again, Poirot receives a letter announcing a murder in Bexhill; again, the crime is committed; and again, the A.B.C. book is left behind. In this manner, the killer murders four people whose names and towns follow an alphabetical pattern. Each time, he taunts Poirot in advance through the mail.

Poirot teams up with Scotland Yard this time, both giving and receiving help. Yet, with every murder, the killer seems one step ahead of the police. Despite this, with each passing crime, Poirot outlines the killer's mind and psychology—showcasing his consistent mastery of psychological profiling. He ultimately cracks the case using this psychological blueprint, aided by Hastings, who occasionally helps tickle Poirot's "little grey cells" without even realizing it.

Poirot's Methods

Throughout the book, Poirot offers brilliant explanations of his own methods. At one point, he directly compares his style to Sherlock Holmes (You may read about adventures of Sherlock Holmes like The Sign Of The Four here on this blog). Sherlock would look for cigar ash, footprints, etc., and wouldn't rely much on police and would be ready for action whenever needed, but Poirot works differently.

Instead of physical action, Poirot prefers to let his grey cells do the work in a rather lethargic manner that sometimes frustrates Hastings. Rather than hunting for physical clues, Poirot makes people talk, unlocking the truth through human interaction. As Poirot explains:

“There is nothing so dangerous for anyone who has something to hide as conversation! Speech, so a wise old Frenchman said to me once, is an invention of man's to prevent him from thinking. It is also an infallible means of discovering that which he wishes to hide.”

True to form, Poirot doesn't just lock up the murderer at the end; he also helps unite two hearts—a signature touch he brings to many of his adventures—while resolving personal problems for the friends he makes along the way. And unlike Holmes, who is often denied his due credits, Poirot happily laps up all the limelight!

The Structure

On a structural level, this novel is narrated by Hastings in a unique way: he tells the story not only of the events he witnesses firsthand, but also shifts into a third-person perspective for the scenes where he wasn't present.

Interestingly, while reading this, it feels almost as though Agatha Christie was already planting the seeds for her later masterpiece, Cards on the Table. At one point, Poirot describes the exact kind of brilliant puzzle he would love to tackle: four people playing bridge, with the host sitting quietly by the fireplace watching them play, only for one of the players to stand up, murder the host, and sit back down without anyone noticing. It is a fantastic little "trailer" for a future book!

Beyond that, the narrative is written in Christie's signature simple, engaging prose. The red herrings here are used very creatively; they don't just distract you, but add a darker, more complex layer to the mystery.

My Verdict

I consider The A.B.C. Murders one of Agatha Christie's best works. It is one of the earliest depictions of a serial killer in classic detective fiction—written long before the term "serial killer" even existed. If you are looking for a thrilling dive into Christie's darker work, this is a fantastic read.

If you wanna discover more H. Poirot's adventure like Death On The Nile or Murder In Mesopotamia, everything is here on The Amateur Detective Blog.




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