How is it possible to say something new about Agatha Christie, the world’s best-selling novelist, whose life and work have been dissected endlessly over the course of a century? It was a question that crossed my mind when I embarked upon my research for Agatha Christie’s Poirot, a book that tells the story of her most famous creation, the titular Belgian detective. I soon had an answer.

While Christie has been the subject of excellent biographies, wide-ranging scholarly analysis, and popular discussion, I felt that there was more to say about the relationship between the author and her protagonist. I wanted to examine the life of Poirot beyond the words and mysteries that she wrote for him.