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 page of the paper on 6 August 1975. Following the great success of "Curtain", Christie gave permission for the release of "Sleeping Murder" sometime in 1976 but died in January 1976 before the book could be released. This may explain some of the inconsistencies compared to the rest of the Marple series—for example, Colonel Arthur Bantry, husband of Miss Marple's friend Dolly, is still alive and well in "Sleeping Murder" although he is noted as having died in books published earlier. It may be that Christie simply did not have time to revise the manuscript before she died. In 2013,