The Big Four
“It is always a delight to meet Hercule Poirot again. He is one of the few detectives with real charm.”
—Dorothy L. Sayers
Hercule Poirot finds himself embroiled in a world of international intrigue and espionage as he investigates a series of mysteries involving the shadowy organization known as the Big Four. These powerful international villains with worldwide reach are engaged in a variety of illicit activities including assassination, kidnapping, theft, and sabotage in their quest for global domination. As Poirot travels from London to Paris, Belgium to Italy, he must summon all his wit and cunning—and the help of his twin brother Achille—to outmaneuver the Big Four and put an end to their nefarious ambitions.
This Warbler Classics edition includes a biographical note.
Agatha Christie (1890–1976) is the world’s bestselling mystery writer. Her much-beloved Hercule Poirot features in more than forty short stories and twenty-two novels. Over the course of more than half a century “The Queen of Mystery” wrote eighty crime novels and short story collections, nineteen plays, and several poetry collections. Her books have sold more than a billion copies in the English language and another billion in a hundred other languages.
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Agatha Christie
Dame Agatha Mary Clarissa Christie, Lady Mallowan, DBE (née Miller; 1890–1976) was an English writer known for her 66 detective novels and 14 short story collections, particularly those revolving around fictional detectives Hercule Poirot and Miss Marple. She also wrote the world's longest-running play, The Mousetrap, which was performed in the West End from 1952 to 2020, as well as six novels under the pseudonym Mary Westmacott. In 1971, she was made a Dame (DBE) for her contributions to literature. Guinness World Records lists Christie as the best-selling fiction writer of all time, her novels having sold more than two billion copies.
Hercule Poirot
Hercule Poirot consists of forty-six books. The current recommended reading order for the series is provided below.

