Agatha Christie was a novelist that wrote about crime.
Agatha Christie . She is best known for her 66 detective novels and 14 short story collections , particularly those revolving around her fictional detectives Hercule Poirot and Miss Marple . Crime fiction is the literary genre that fictionalises crimes , their detection , criminals , and their motives . Detective fiction is a subgenre of crime fiction and mystery fiction in which an investigator or a detective -- either professional or amateur -- investigates a crime , often murder .