"Howdunit" is a term used to describe a mystery novel or story that focuses on the investigation of a crime. Some synonyms for this word include "whodunit," which is often used to describe a murder mystery, and "detective story," which emphasizes the role of the investigator in solving the crime. Other terms, like "clue-filled," "sleuthing," and "whodunnit," can also be used to describe a story that challenges the reader or viewer to solve a crime alongside the characters. Whatever term is used to describe it, the howdunit genre remains popular with people who enjoy both a good mystery and a challenging puzzle to solve.