Agatha Christie was a famous British crime writer born in 1890 who created two iconic detective characters, Hercule Poirot and Miss Jane Marple. She wrote 66 detective novels and 14 short story collections featuring these characters between 1920 and 1976. Poirot was a neat and orderly Belgian detective who preferred to use logic and reasoning to solve crimes, while Marple was an elderly woman living in the English village of St. Mary Mead who used her observations of human nature to solve mysteries. Christie is considered the most important writer in the detective genre and her books have sold over 4 billion copies worldwide, more than any other author.