Queen of Crime
https://www.newyorker.com/magazine/2010/08/16/queen-of-crime
A 2010 article in the New Yorker by Joan Acocella discusses Agatha Christie's life and work as a whole, analyzing how elements of her style emerged from realities in her experience.
What Was the Inspiration for “The Murder on the Orient Express”?
https://www.smithsonianmag.com/history/what-was-inspiration-murder-orient-express-180967305/
In an article for Smithsonian magazine, Natalie Escobar lays out the parallels between the fictional kidnapping of Daisy Armstrong and the real-life kidnapping of Charles Lindbergh, Jr. The article also briefly delves into other real-life people and situations that may have inspired Agatha Christie's writing.