The Big Four

Set against the backdrop of personal turmoil in 1926, the book showcases Agatha Christie's collaboration with her brother-in-law, Campbell Christie, to compile her recent Poirot stories into a cohesive novel. Following the loss of her mother and her marital struggles, Christie opted for this approach to alleviate the stress of writing a new work. With Campbell's help, the stories were revised for better flow while maintaining their original substance, distinguishing this compilation from her later works.