I'm trying to procure the Collector's Set (in it's extreme) or the game guide that's coming out. The collector's *technically* has the first art book featuring Akihiko Yoshida's work (the guide probably being the second best source for that...hopefully).
I can't believe Squeenix wants to leave this to fans demanding it on social networks.... I pray if the game does well in Japan they'll look at this game as an overseas candidate (which I think is good so far, Amazon [jp] is sold out).
The soundtrack is brilliant as well. I'm surprised it took a Sound Horizon composer and not Hitoshi Sakimoto, but this isn't too bad a change, it's got a very fresh sound to it.