AudioBookPlus: The Sign of the Four

Listen to and read Sir Arthur Conan Doyle's 'The Sign of the Four' a Sherlock Holmes adventure. Holmes, the eccentric detective whose study of crime allows him to shed light on the most complex criminal investigations.

Key Features:
- All audio read by a human, not a computer
- Real-time synching of each word read, so you can follow audio visually
- Slow down or speed up the audio to better follow along
- You can choose to read, listen, or do both simultaneously
- Chapter audio files can be downloaded as needed to save space on your mobile device
- Audio can be accessed off-line