This document provides an interactive lesson on famous detectives from books and films. It begins by asking the user to identify a detective, then asks them to name real and fictional detectives. It provides information on Sherlock Holmes and his creator Arthur Conan Doyle. Subsequent tasks profile other detectives like Hercule Poirot, Miss Marple, and allow the user to help solve a case with Poirot or discuss adaptations of these detectives in film and literature.