The Guinness Book of World Records lists Agatha Christie as the best-selling novelist of all time, selling roughly 2 billion copies. Who was this remarkable woman? How did she come to write her indelible works? Why is she still such a popular literary figure? These and other questions will be explored along with a real-life mystery about Christie’s dramatic disappearance in 1926 that remains substantially unsolved to this day. As the summer reading season wanes, let’s settle in with a few good thrillers.