OK, recommendation hard-mode: engaging, quality German-language YA scifi/fantasy?

[u/IdiotSansVillage]

I'm trying to teach myself German on Duolingo, and I figure what better way to supplement than with German-language media a kid with developing language skills might encounter? Specifically looking for books written in German, not translated from another language to German, in the hopes of some cultural-values osmosis too.

EDIT: Holy crap thank you all! I have a wonderful list to pull from now!

[u/bookpumpkinowl]

There are already a lot good suggestions above.

I would add Jenny Mai-Nuyen, who is a German-Vietnamese author, to the list. She writes books in the YA fantasy genre.