Four ruthless criminals. One genius detective. A plot to control the world.
When a sudden death interrupts Hercule Poirot's quiet evening, the great Belgian detective is swept into an international web of espionage and intrigue. Clues point to an elusive organization known only as "The Big Four"—a shadowy network whose influence reaches into politics, finance, science, and crime.

Each member is a master in their field: a criminal genius, a financial mastermind, a brilliant scientist, and an assassin with many faces. Together, they are nearly untouchable… until Poirot makes them his quarry.

From London's fog-shrouded streets to secret hideouts across the globe, The Big Four blends classic whodunit elements with the pulse-pounding tension of a spy thriller, proving Agatha Christie's storytelling mastery extends far beyond the drawing room.

"A fascinating fusion of detective fiction and high adventure."
– The Times (London)

"Poirot against an organization instead of a single murderer—fresh, exciting, and packed with surprises."
– Crime Fiction Lover

If you enjoy mysteries with global stakes, brilliant twists, and a detective who never misses a detail, this is one Poirot case you won't forget.

✅ Why Readers Love It:
? A rare Agatha Christie novel with an international conspiracy at its heart

?️ Poirot showcases his cunning on a grand scale

⚡ Fast-paced and full of unexpected turns

? Click 'Buy Now' to join Hercule Poirot as he takes on the most dangerous enemies of his career—the elusive and deadly Big Four.