Light from Uncommon Stars by Ryka Aoki
Don't read this book if hungry. This author writes about food in the way that Tolkien writes about trees: with exquisite and infuriating detail.
A queen of hell, a demon, a family of aliens, a homeless violinist, a doughnut store, video game music... it's so hard to tie this story down into a single review.
Just go with it. It'll be worth it.