Agatha Christie: Mysteries and Murders in the Making: Collecting Agatha Christie's Secret Notebooks and Agatha Christie: Murder in the Making

Agatha Christie’s Complete Secret Notebooks: Stories and Secrets of Murder in the Making

Agatha Christie’s Secret Notebooks: Fifty Years of Mysteries in the Making - Includes Two Unpublished Poirot Stories

Agatha Christie: More Stories and Secrets from Agatha Christie's Notebooks

The Murder Game: Play, Puzzles and The Golden Age

Agatha Christie’s Murder in the Making: Stories and Secrets from Her Archive - includes an unseen Miss Marple Story