[MortalMonday]

Also want to mention once again that although, the unsigned version does not indicate whether it's a limited product, there may still be the chance that this will only have a single print run. The point being that if you're interested in the book, you may want to scoop up a copy just in case it is indeed a single print run.

The Bioshock: Breaking the Mold artbook was sold through the Irrational Store (then the 2K store technically), and it was limited to a single run. That book is now a somewhat scarce book. You can find it on eBay from time to time, but it sells for exponentially more than what it originally retailed for.