Dame Agatha Mary Clarissa Christie was a famous British crime writer born in 1890 in Torquay, England. She is best known for writing 66 detective novels and 15 short story collections featuring characters like Hercule Poirot and Miss Marple. Some of her most famous books include And Then There Were None, Murder on the Orient Express, and The Murder of Roger Ackroyd. She also wrote romances under the pen name Mary Westmacott. Christie is considered one of the best-selling authors of all time.