霍姆斯面臨犯罪主謀，莫里亞蒂教授。
In this adventure, Holmes confronts the criminal mastermind, Professor Moriarty. This short story was considered by Sir Arthur Conan Doyle as one of the best Sherlock Holmes stories.
With this app, you can read the text, listen to the professional audio narration without internet connection (download the audio file once before listening), or watch the video with synchronized text and audio (requires an internet connection).
When listening to the audio narraion, you may exercise your sagacity playing the slider puzzle.
Narrator: Wally Fields
Duration of the audio narration: 36 minutes