Awesomeness! Oh, there's quite a bit. Ooooh, paper minis sound cool, I think I'll get those with the book to start when I can afford it.
By the way, about Heavenly Bodies and Earthly Beings, are those characters and the like for the game, or just art in general? They're categorized as "Art and studies", so I don't know quite what to think there.
So the art books from from me not being able to find enough SEA fantasy visuals (that I like), so it's an exploration of different possibilities/visuals. Sort of like a mood board for myself. So they are art for the project but not specifically a thing at the moment (might make it a thing in the future). I got DM friends who use the art just to kind of set the tone, help other folks imagine and immerse in this world.
The studies are for a few entries about cool actual objects in SEA, like What do folks use as paper? betel sets, etc.