Ver Cuevana2. British writer Agatha Christie (1890-1976) published her first novel in 1920, in which the eccentric Belgian private sleuth Hercule Poirot made his debut. Later, in 1927, the first short story starring the gentle spinster Miss Jane Marple appeared. A fascinating journey through popular culture in search of the footprints of two of the most charismatic characters in crime and mystery literature.