The $2.99 Underground Kingdom app, which is the first in a series of new apps, lets readers star as the hero of the adventure. Readers can make their way through the story, which is brought to live with animation and sound-effects.
Readers are invited to interact with characters and choose the direction of the plot along the way. There are 23 possible endings and 50 animated illustrations to help bring the story to life. Users can map their path and even share their way via Facebook and Twitter. Read more