bought the game on ps4 but want the artbook

[Don Quixote]

steam and GOG dont allow you to purchase the artbook as a standalone thing due it to being DLC. am i just screwed or is there some way to get the artbook otherwise?

[Null Winter]

You could try emailing some proof of purchase to the devs and they might take pity upon your artless soul.

Alternatively, bug them to add the artbook for sale on their site.