A Study in Scarlet
by Sir Arthur Conan Doyle

A Study in Scarlet: Genre 1 key example

Part 1, Chapter 2: The Science of Deduction
Explanation and Analysis:

A Study in Scarlet is an early example of detective fiction. The modern detective fiction genre—in which an investigator or detective investigates a crime, usually a murder, and uses their keen observational skills to reconstruct the crime and identify its perpetrator—arose in the mid-19th century, shortly after the Industrial Revolution.