Some of them were drawn from her own experiences as a hospital nurse in the war, and from spending a lot of time in the large country houses which feature so prominently in her stories.
Agatha Christie wrote 80 detective novels, so, yes, she did write mysteries.
The link below is to the wikipedia list of Agatha Christie's publications by year.
Agatha Christie's Marple is a television series that is broadcasted on the British ITV network, and is based on novels by Agatha Christie. The name comes from the Miss Marple novels, but the series only features few episodes that are actually based on the books. All other episodes are largely based on other works by Agatha Christie.
The stories of Hercule Poirot were written by Agatha Christie, a renowned British author known for her detective fiction novels. Poirot first appeared in Christie's novel "The Mysterious Affair at Styles" and went on to feature in many of her works.
Some of the main countries featured in Agatha Christie's novels include England, Egypt, France, and the United States. Christie's writing often takes readers on a journey to explore various locations and cultures as part of the mystery plots.
Over 30 of Agatha Christie's novels have been adapted into movies, including popular titles like "Murder on the Orient Express," "Death on the Nile," and "And Then There Were None."
Agatha Christie visited at least 41 countries during her lifetime. She drew inspiration from her travels and incorporated elements of different cultures into her novels.
Agatha Christie's full name is Agatha Mary Clarissa Christie.
Agatha Christie went by The Queen of Crime.
Agatha Christie's famous detective is Hercule Poirot.
Yes, Agatha Christie did spend some time in Switzerland. She visited the country numerous times throughout her life and even set some of her novels in Swiss locations.
Agatha Christie wrote over 80 books in her lifetime. She also wrote 19 plays and had 40 of her books or short stories televised. One of her most famous works was "Murder on the Orient Express".