1. Agatha Christie: An Autobiography.
-Self-explanatory.
2. The Lost Days of Agatha Christie by Carole Owens.
-Book investigating her disappearance in 1926.
3. The 8:55 to Baghdad: From London to Iraq on the Trail of Agatha Christie and the Orient Express by Andrew Eames.
-A dual literary biography and travelogue inspired by Agatha Christie's 1928 ride on the Orient Express follows the author's recreation of Christie's train ride to the Middle East, a journey during which he encountered modern dangers and a host of colorful fellow travelers. Reprint.
4. Everyman's Guide To The Mysteries of Agatha Christie: An Agatha Christie Reference Book by Bruce Pendergast.