Don’t think this a widely known book but seraphina more specifically the second one. shadow scale by Rachel hartman

Spoiler?

finished reading it in my math class last year, when she killed off my favourite character with no warning, and I couldn’t react because I didn’t want to seem weird

Love Reading and my family knows that this but won’t get me a book unless I directly ask, so the worst one has to be either the bible or the French dictionary, I lost both of them