This improv game is in the following improv game categories:
This is a Long Form
format. Instead of getting suggestions from the audience, a (preferably well known local) writer is invited to provide the first two pages of a non existing novel. These pages are read to the audience (preferably by the writer herself) and the rest of the story is then improvised.
The format is attributed to the National Theatre of the World in Toronto. As far as we know the format is copyrighted; you'll need permission to perform it.