Be an author...

So the world is now writing a book through text messages...

‟Text 'line' to 41411 and you will be subscribed to Penultimater.
You will then, when chosen, receive the last line written in the story. It's your responsibility to reply with keyword 'line' and the next sentence within 10 minutes. The story demands it!"

Pretty neat. I subscribed...here is the link if you are interested.