The Long Dark Tea-Time of the Soul is a 1988 humorous fantasy detective novel by Douglas Adams. It is the second book by Adams featuring private detective Dirk Gently, the first being Dirk Gently's Holistic Detective Agency. Adams had intended to follow it with a third such novel, The Salmon of Doubt, but he died before completing it; an unfinished draft is included in a posthumously published collection of the same name.
