The Big Four

by Agatha Christie

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"The Big Four" by Agatha Christie is a detective novel published in 1927. When a dying stranger staggers into Hercule Poirot's bedroom and whispers about an international crime cartel, the famous detective and his friend Hastings find themselves pursuing a shadowy organization led by four powerful masterminds.

Summary from Project Gutenberg.

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Topics: Detective and mystery stories, English · Murder -- Investigation -- Fiction · Mystery fiction · Poirot, Hercule (Fictitious character) -- Fiction · Private investigators -- England -- Fiction · Secret societies -- Fiction