Agatha Christie 2 billion copies, and her estate claims that her works come third in the rankings of the world's most-widely published books, behind only Shakespeare's works and the Bible. According to Index Translationum, she remains the most-translated individual author, having been translated into at least 103 languages. "And Then There Were None" is Christie's best-selling novel, with 100 million sales to date, making it the world's best-selling mystery ever, and one of the best-selling books of all time. Christie's stage play "The Mousetrap" holds the world record for longest initial run. It opened at the Ambassadors Theatre in the West End
Agatha Christie However, unlike Conan Doyle, Christie resisted the temptation to kill her detective off while he was still popular. She saw herself as an entertainer whose job was to produce what the public liked, and the public liked Poirot. She did marry off Poirot's companion Captain Hastings in an attempt to trim her cast commitments. In contrast, Christie was fond of Miss Marple. However, the Belgian detective's titles outnumber the Marple titles more than two to one. This is largely because Christie wrote numerous Poirot novels early in her career, while "The Murder at the Vicarage" remained the sole Marple novel