These are immersive literary experiences that use a digital device to convey their story. They rely on the presence of its reader to activate the narrative, which is best explained as - a book is a finished thing before it is opened. Its physicality can't be changed. An Ambient Literature work is really an assembly of parts that only come together as story when a reader begins it. 

We've been making these types of immersive experience for several years. The products on this site are those that have a physical, book-like accompaniment.