“One of the luckiest things that can happen to you in life is to have a happy childhood. I had a very happy childhood,” says Agatha Christie in the opening sentences of her autobiography. The world greatest mystery writer of all times was born in Devon, England in 1890 into a comfortably well-off middle-class family. Over the course of six decades, she wrote ninety-three books and seventeen plays. She is the only mystery writer to have created two important detectives as characters: Hercule Poirot and Miss Marple. She died in 1976.