When Agatha Christie died in 1976, aged 85, she had become the world’s most popular author. With sales of 2 billion copies world wide, she had achieved more than one book every year for fifty years. It was even claimed that she must have had a photographic memory. Was this true, or was there a more mundane explanation? Following the death of Agatha’s daughter Rosalind in 2004, seventy-three of Agatha’s notebooks were found at the family home of Greenway. Archivist John Curran began deciphering Agatha’s unmistakeable and difficult to read handwriting and found a bigger treasure trove than he first imagined. There are alternative plots, titles and characters; deleted scenes; outlines for books she didn’t get to write – and two complete unpublished Hercule Poirot novels:  The Incident of The Dog’s Ball and the thirteenth Labour of Hercules, both included in this volume.  A must for any Christie buff.