4.5 
 Ugh, this was surprisingly good. I never wanted to stop reading (#hooked), which made me initially rate this a five! I agree with the reviewers that the secondary characters were left under-developed. But mein Gott, I LOVED that the author was not shy about talking about periods! The last Western YA book I read made no mention of it (and in that the protagonist also pretended to be male), so I was very pleasantly surprised :D 
 Shoutout to Cici for teaching me some German while I was in Austria because I could understand without Google Translate sometimes! Ugh I badly want to learn more.