Enid Blyton a collection of papers belonging to Blyton's daughter Gillian, purchased by Seven Stories in 2010 following her death. It was initially thought to belong to a comic strip collection of the same name published in 1949, but it appears to be unrelated and is believed to be something written in the 1930s, which had been rejected by a publisher. In a 1982 survey of 10,000 eleven-year-old children Blyton was voted their most popular writer. She is the world's fourth most-translated author, behind Agatha Christie, Jules Verne and William Shakespeare with her books being translated into 90 languages. From 2000 to
Agatha Christie 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. In 2012, Christie was among the British cultural icons selected by artist Sir Peter Blake to appear in a new version of his most famous artwork – the Beatles' "Sgt. Pepper's Lonely Hearts Club Band" album cover – to celebrate the British cultural figures of his life that he most admires.