Agatha Christie was an English crime writer born in 1890 and died in 1976. She is considered the "Queen of Crime" and wrote 80 detective novels and plays featuring famous detectives like Hercule Poirot and Miss Marple. Some of her most famous books include Murder on the Orient Express and Death on the Nile. Christie published widely in her career and was meticulous about providing clues for readers to solve the mysteries in her stories. She revolutionized the genre of detective fiction.