I think the "under exclusive license to Kobalt Label Services" answers one question.
Bad Seed Ltd. is a publishing company and not necessarily a Record Label as such - at least in this instance, at this stage of Cave's re-juggling of his business affairs.
Just because the book is printed in Mexico does not automatically mean it's a US release.
Were the book printed in China instead (also cheap place for printing) would that make it Chinese?
If you possess or know of a US version with the very same cat# and barcode, speak up.
If not, take my word for it - I had to pre-order in UK due to the limited run quantity manufactured.
These weren't sitting on supermarket shelves.