There WILL be... but not yet apparently.
I imagine there will be a good number of books. Stardock's method of countering piracy is to have constant and very solid updates, in this case opting to include entire segments of the campaign with the patches. I'd kill to have 5-10 hours added to more games in future patches (I'm looking at you starcraft 2... making me wait like 2 years for more single player content)
