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 the Christie family gave their "full backing" to the release of a new Poirot story, "The Monogram Murders", which was written by British author Sophie Hannah. Hannah later released a second Poirot mystery, "Closed Casket", in 2016. Christie's reputation as "The Queen of Crime" was built upon the large number of classic motifs that she introduced, or for which she provided the most famous example. Christie built these tropes into what is now considered classic mystery structure: a murder is committed, there are multiple suspects who are all concealing secrets, and the detective gradually uncovers these secrets over the course