Yeah I was at best buy earlier and I saw that. It looks like a cool item to have as I think it actually is exclusive to Best Buy and very few of the copies had it. If I could ever pick up a copy for $40 after a price match to Target's $20 GC I would pick it up and sell the game and keep the artbook as I'm pretty sure they are package individualy.
Just got back from Best Buy. The hardcover novella is packaged in a cardboard sleeve with the game. The game is shrinkwrapped itself so you could sell the game separately as new.
However, I do not know if the game has a bar code on it or not. I'm going to wait it out to see if this is limited before I decide to keep it or not. Maybe watch for an unpackaging video.
Note that there was only two at my store that the guy had on a cart. They didn't put any of the standard editions out yet as I got there right at opening. He also said that all of the CEs were at the front desk and implied they had no extras.