Agatha Christie pleased to have their own novels in print in 100 years. Just one of the 25 authors held with Edmund Wilson's views. Harper Collins also published a souvenir magazine "Shocking Real Murders: Behind Her Classic Mysteries". The "Guinness Book of World Records" lists Christie as the best-selling novelist of all time. Her novels have sold roughly 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. Half of the sales are of English language editions, and the other half in translation. According
Agatha Christie's fictional universe after Agatha Christie died, are included in the lists. Her novels under the pen name Mary Westmacott and her nonfiction books are not covered in this article. One notable example of characters from one novel appearing in another is the novel "The Pale Horse", which features Ariadne Oliver, Major Despard and his wife Rhoda (all had previously appeared on "Cards on the Table") and Mrs Dane Calthrop (from "The Moving Finger"). Outside of stories by Christie herself, adaptations of her works have also featured crossovers: Agatha Christie's fictional universe In Agatha Christie's mystery novels, several characters cross over different sagas,