"The Mystery of 31 New Motel" is an exciting detective novel by the famous English writer Richard Austin Freeman. This book tells the story of a mysterious event that happened in a famous motel. The main character, Detective Callis, faces difficult circumstances and unusual mysteries that desperately need to be solved. The author skillfully reveals the psychology of the characters and uses unexpected turns of events to keep the reader in suspense until the last page. "The Mystery of 31 New Motel" is an exciting and dizzying journey into the world of unsolved mysteries.