From the update:
...for $20, backers will be able to acquire the Deluxe Rulebook. This hardcover book will be over 120 pages and contain not only the rules of ASOIF:TMG but also the amazing art created for the game! We'll include the art created for House Stark, House Lannister and the Mercenary forces, not limited to the units presented in this Kickstarter campaign!
Still 11 days left in the campaign to get in on the action.