Dirk Gently's Holistic Detective Agency (1988) Front Cover Book Details Author Douglas Adams Genre Mystery; Science Fiction Publication Date 5/1/2002 Personal Details Rating 8 Read It Yes Links Amazon US Powell's Powell's Barnes & Noble Product Details GroupNo DG1 Original Details Original Publication Year 1988 Plot There is a long tradition of Great Detectives, and Dirk Gently does not belong to it. But his search for a missing cat uncovers a ghost, a time traveler, AND the devastating secret of humankind! Detective Gently's bill for saving the human race from extinction: NO CHARGE.