Exploring storytelling using twitter is one of the many new “genres” in digital storytelling. Here is Andrew Fitzgerald explaining what it is:
https://embed-ssl.ted.com/talks/andrew_fitzgerald_adventures_in_twitter_fiction.html
Viking / Penguin have taken the lead in this new format and there is a dedicated website to some of the best examples.
Informative Flights - Musings of a Teacher Librarian 