The Big Four

A conspiracy of intelligence and ambition, where a hidden network challenges the limits of detection itself.

In The Big Four, Agatha Christie brings together detective Hercule Poirot and his companion Captain Hastings in a case that expands beyond a single crime into an international web of intrigue.

The narrative follows Poirot as he uncovers evidence of a powerful organization known as “The Big Four,” composed of individuals operating across different countries and spheres of influence. Each member appears to control a distinct domain—political manipulation, scientific experimentation, financial power, and covert operations—creating a structure that resists conventional investigation. As the investigation unfolds, Poirot is drawn into a series of deceptive scenarios, false identities, and strategic traps designed to obscure the group’s true nature and objectives.

The story combines elements of detective fiction with espionage, emphasizing large-scale coordination, psychological manipulation, and the limits of individual deduction when faced with organized global threat. The Big Four stands as one of Christie’s more ambitious works, expanding the scope of the traditional mystery into international intrigue.

This Carlini Classics edition presents the complete, unabridged text in a beautifully designed format made to last.

• A blend of detective fiction and international intrigue
• A high-stakes mystery featuring Hercule Poirot
• A structured exploration of conspiracy, deception, and intelligence

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.

Elegantly produced and enduring in form, this edition preserves Christie’s suspenseful narrative in a volume designed for lasting enjoyment.

About the author

Agatha Christie (1890–1976) is one of the most celebrated authors of all time, renowned as the “Queen of Mystery” for her ingenious detective novels and short stories. With over two billion copies of her works sold worldwide, she is best known for creating iconic characters such as Hercule Poirot and Miss Marple. Christie’s ability to craft intricate plots, surprising twists, and memorable characters has cemented her legacy as a master of the genre. Her works continue to captivate readers and inspire adaptations for stage, screen, and television, ensuring her place as a timeless literary icon.