The Big Four

Four masterminds. One Belgian detective. Civilization hanging by a thread.

Most of the time, Hercule Poirot's cases begin with a dead body in a locked room or a stolen pearl on a country estate. This time, the case begins with a mysterious stranger bursting into his apartment, gasping about a shadowy conspiracy of four masterminds, and then collapsing dead on the rug. Welcome to spy fiction, Christie-style.

The Big Four is not your typical Poirot novel. There is no sleepy English village, no drawing-room confrontation, no leisurely sifting of alibis. Instead, Poirot and his long-suffering sidekick Captain Hastings chase an international criminal syndicate across Europe, trying to prevent the overthrow of civilization itself. The titular Four are a Chinese mastermind (Number One), an American billionaire (Number Two), a French scientist (Number Three), and a shadowy figure known only as "The Destroyer" (Number Four). They control governments, manipulate markets, and have a habit of turning up in disguise just when Poirot least expects them.

The novel is a collection of linked short stories, stitched together into a novel-length narrative. The chapters zip from London to Paris to the Austrian Alps, featuring lookalike impostors, doomsday devices, faked deaths, and a finale that finds Poirot confronting the Four in a hidden mountain lair—complete with a trapdoor, a pool of acid, and the fate of the world hanging in the balance.

This is Christie at her most unapologetically pulpy. The plotting is frantic, the villains are cartoonish, and the action sequences would not be out of place in a James Bond film (a decade before Bond existed). It is not elegant. It is not subtle. But it is a wild, breathless ride—and a fascinating glimpse of what happens when the queen of the cozy mystery tries her hand at global espionage.

• First published in 1927, the seventh Hercule Poirot novel, originally serialized in The Sketch magazine

• A rare departure from Christie's usual country-house formula, venturing into international thriller territory

• Features the return of Captain Hastings, Poirot's faithful sidekick, who had been absent since The Murder of Roger Ackroyd

Available in multiple formats:

• Paperback & Hardcover: Beautifully designed print editions presenting the complete, unabridged text made to last.

• Ebook: DRM-free EPUB compatible with Kindle, Kobo, Apple Books, and all major e-readers.

• Audiobook: Professionally narrated, complete and unabridged, available on all major audiobook platforms.

A beautifully crafted edition for your shelf, your device, or your ears, or the perfect gift for anyone who has ever wondered what Poirot would do if the fate of the world were at stake.

About the Author

Agatha Christie (1890–1976) was an English crime novelist, short story writer, and playwright, widely regarded as the best-selling novelist of all time. Her works have sold over two billion copies worldwide, outranked only by the Bible and Shakespeare. The Big Four was written during a transitional period in Christie's career. She was experimenting with different forms, moving beyond the classic whodunit into the faster-paced world of the thriller. The novel was not a critical favorite—many fans prefer her more traditional mysteries—but it has gained a cult following among readers who enjoy seeing Poirot in an unfamiliar role: action hero. She died in 1976 in Wallingford, Oxfordshire.