"The Big Four" is an exciting detective story by the famous English writer Agatha Christie. In this book you will find incredible tension, mysterious crimes and exquisite plot intrigue. The main character, the famous detective Hercule Poirot, enters into a fight with the secret organization "Big Four", which holds the whole world in their hands. Will Poirot be able to uncover the fraud of this powerful organization and bring justice? This book will definitely captivate you with its plot and intrigue until the very last paragraph.