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 bibliography at March 2018, was still running; in 2009 the London run exceeded 25,000 performances. In September 2015 a public vote identified "And Then There Were None"—originally published in 1939 under the name "Ten Little Niggers"—as the public's favourite Christie novel; the book was the writer's favourite, and the one she found most difficult to write. In September 1930 Christie married the archaeologist Max Mallowan. The pair travelled frequently on archaeological expeditions and she used the experiences as a basis for some plots, including "Murder on the Orient Express" (1934), "Murder in Mesopotamia" (1936) and "Death on the Nile" (1937). She