Since there were about forty of them, it must be a lot. I don't know the titles and you can edit my answer if you want.
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.
There is no book called "Hercule Poirot". Agatha Christie wrote thirty-four novels and sundry stories featuring Poirot, but none of them has that name.
Agatha Christie wrote the mystery novels starring the detective Hercule Poirot.
Agatha Christie had two middle names - she was born Agatha Mary Clarissa Miller (Christie was her first married name).
The first novel Agatha Christie wrote was The Mysterious Affair at Styles, which featured Hercule Poirot. It was published in 1920.
Agatha Christie is the author of Death on the Nile
Agatha Christie created many detectives such as miss Jane marple, Hercule Poirot, Tommy and tuppence Beresford, and Harley Quinn and Mr. Satterthwaite.
Her most famous Belgian detective would be Hercule Poirot. He featured in many books, the first of which was 'The Mysterious Affair At Styles', written in 1921. Agatha Christie also wrote about other detectives, such as: Miss Marple and Tommy and Tuppence.
The Mysterious Affair at Styles was her first novel, published in 1920 and introducing the detective Hercule Poirot.
The famous novel "Murder on the Orient Express" was written by Agatha Christie. It was first published in 1934 and features her iconic detective character, Hercule Poirot, solving a murder mystery aboard the luxury train.
The last novel which Agatha Christie wrote was Postern of Fate, a Tommy and Tuppence story, published in 1973.She had written the last Poirot story, Curtain, and the last Miss Marple story, Sleeping Murder during World War 2, with the intention of being published after the author's death.Curtain was published in 1975, and Sleeping Murder in 1976.Agatha Christie died on 12th January 1976.Read more: What_was_Agatha_Christie's_last_novel
Agatha Christie was born into the leisure class and did not have to work. However she did volunteer work during WW1 in a hospital pharmacy. There she learned a great deal about medications and poisons.