Book Lovers UnInterrupted discussion

Wikipedia defines transmedia storytelling, also known as multi-platform storytelling or cross-platform storytelling, as the technique of telling stories across multiple platforms and formats using current digital technologies. In other words, each platform allows the author to tell the story in a different way. It is not a matter of adding extras (videos, podcasts, etc.), as occurs in enhanced books. Each format is part of the story and provides a different experience.

Growing Demand for Transmedia Stories

I know a book like this. A Greater Monster by my author friend.