A short, fast-paced mystery novelization based on the Adventures of Mary-Kate and Ashley series. In this story, the Olsen twins take on the role of junior detectives who are called to solve a puzzling crime inside a busy hotel. A mysterious incident disrupts the  hotel's operations, and Mary-Kate and Ashley jump into action with their signature mix of curiosity, confidence, and teamwork. Along with their dog, Clue, they interview quirky suspects, follow clues through the hotel's halls, and piece together what really happened. The book is written for young readers, blending humor, light suspense, and a satisfying resolution that rewards careful observation. It's a fun, accessible mystery for kids who enjoy detective stories, especially fans of the Olsen twins' adventure series.