Detective uniformed colleagues. Some are private persons, and may be known as private investigators, or as "The Eye That Never Sleeps" – the motto of the Pinkerton Detective Agency or shortened to simply "private eyes". The detective branch in most large police agencies is organized into several squads or departments, each of which specializes in investigation into a particular type of crime or a particular type of undercover operation, which may include: homicide, robbery, burglary, auto theft, organized crimes, missing persons, juvenile crime, fraud, narcotics, vice, criminal intelligence, aggravated assault/battery, sexual assault, computer crime, domestic violence, surveillance, and arson, among others.
Dirk Gently's Holistic Detective Agency Dirk Gently's Holistic Detective Agency Dirk Gently's Holistic Detective Agency is a humorous detective novel by English writer Douglas Adams, first published in 1987. It is described by the author on its cover as a "thumping good detective-ghost-horror-who dunnit-time travel-romantic-musical-comedy-epic". The book was followed by a sequel, "The Long Dark Tea-Time of the Soul". The only recurring major characters are the eponymous Dirk Gently, his secretary Janice Pearce and Sergeant Gilks. Adams also began work on another novel, "The Salmon of Doubt", with the intention of publishing it as the third book in the series, but died before completing it.