Agatha Christie, an English writer sold roughly 2 billion novels copies (1890–1976).

The Guinness World Records lists Christie as the best-selling novelist of all time.

Agatha Christie is known for her 66 detective novels and 14 short story collections, particularly those revolving around her fictional detectives Hercule Poirot and Miss Marple. The Guinness World Records lists Christie as the best-selling novelist of all time.

Best-selling author Agatha Christie published her first novel, The Mysterious Affair at Styles, in 1920, and went on to become one of the most famous writers in history, with mysteries like Murder at the Vicarage, Partners in Crime and Sad Cypress.

Playwright

Christie was a renowned playwright as well, with works like The Hollow (1951) and Verdict (1958). Her play The Mousetrap opened in 1952 at the Ambassador Theatre and—at more than 8,800 showings during 21 years—holds the record for the longest unbroken run in a London theater. Additionally, several of Christie's works have become popular movies, including Murder on the Orient Express (1974) and Death on the Nile (1978).

Christie was made a dame in 1971. In 1974, she made her last public appearance for the opening night of the play version of Murder on the Orient Express. Christie died on January 12, 1976.