Hey I'm game for the "Special campaign for book buyers." Reason is I really hope this works out for Random House. As a whole the game industry could use better writing. There are some notable exceptions like Bioware, but usually the writing is not that good. So, if a book publisher starts to see benefits to working with game devs, maybe we get some better written games out of it.
In terms of the book itself, who knows? Brad is an unproven author at this point so it could be great, could be crap, or could be anything in between. I'll be interested to see. Generally I don't care for fantasy novels, but hey.
However, I'll get it for the game content alone because I hope to encourage these kind of partnerships. If authors and in particular editors (because often games have decent foundations, they just need some polish) can be encouraged to work with dev houses, I think we could get some far more polished games.