Agatha Christie 1890 - 1976 Agatha Christie is the world's best-known mystery writer. Her books have sold over a billion copies in the English language and another billion in over 45 foreign languages. She is outsold only by the Bible and Shakespeare.
Agatha Christie age 22 in 1912 Christie was a teetotaller and non-smoker. She tried unsuccessfully to make herself like cigarettes by smoking one after lunch and one after dinner every day for six months but to no avail.