Heya! I know you don't mean any harm, and I know I can't speak for Yuumei, but -- for future reference, it is generally poor taste to ask an artist to use their work for free. Artists put a lot of time and effort into honing their skill throughout their lives, and then some for each individual piece. Such effort is often terribly undervalued by the public, and it just tends to slip people's minds (it's forgivable), often resulting in artists being asked to work for free or "for the exposure", or to give away rights or use of their art, when in fact they deserve compensation like anyone else, no matter what for (buying for home decor, buying prints, using in advertising, or just to accompany stories). And in this case, Yuumei already uses much (if not most) of her art for her own stories.Some artists, and Yuumei *could* be one of these, might not mind however you wish to use their art. But for the most part they'll make this transparent, as most artists I've seen will echo what I've said.I think it's wonderful that you're writing and wanting to further bring it to life through art! However, might I suggest making it completely yours, by illustrating it yourself? I know it's easier said than done, but improving one's drawing skill is super valuable! And it can also give the artist a deeper appreciation for the time and effort it takes, and then one day you could be creating things just as beautifully as Yuumei, but with your own personal flair to it <3 I very much encourage people to be their own artists!And good luck with your books!!Writing is a noble skill in itself~