I love the cover of this book, but the thing that makes me really want to read more is the set up. It mentions this world of fae right at the start (and I LOVE fae stories) then we flip back to the seemingly ordinary world. The tease that there's something supernatural around makes the set up to the story fly by quickly, as we build up to meeting the unnerving boy. I'm not particularly a fan of Mozart, but I do enjoy supernatural historical fiction/retellings, and there's something about Nannerl that makes me want to read more.