And Then There Were None is a mystery novel by the English writer Agatha Christie, who described it as the most difficult of her books to write. It was first published in the United Kingdom by the Collins Crime Club on 6 November 1939, as Ten Little Niggers,cite news|work=The Observer|title=Review of Ten Little Niggers |date=5 November 1939|page=6 after an 1869 minstrel song which serves as a major plot element. The US edition was released in January 1940 with the title And Then There Were None, taken from the last five words of the song. Successive American reprints and adaptations use that title, though American Pocket Books paperbacks used the title Ten Little Indians between 1964 and 1986. UK editions continued to use the original title until 1985. The book is the world's best-selling mystery, and with over 100 million copies sold is one of the best-selling books of all time. The novel has been listed as the sixth best-selling title (any language, including reference works). These details correspond to the text of the 1939 first edition. Eight people arrive on a small, isolated island off the Devon coast, each having received an unexpected personal invitation. They are met by the butler and cook/housekeeper, Thomas and Ethel Rogers, who explain that their hosts, Ulick Norman Owen and Una Nancy Owen, have not yet arrived, though they have left instructions. A framed copy of an old rhyme hangs in every guest's room, and on the dining room table sit ten figurines. After supper, a phonograph record is played; the recording accuses each visitor and Mr and Mrs Rogers of having committed murder, then asks if any of the "prisoners at the bar" wishes to offer a defence. The guests discover that none of them know the Owens, and Mr Justice Wargrave suggests that the name "U N Owen" is a play on "Unknown". Marston finishes his drink and promptly dies of cyanide poisoning. Dr Armstrong confirms that there was no cyanide in the other drinks and suggests that Marston must have dosed himself.