I thought this was lovely, and an interesting take on the magic school trope - what happens to the kids who are left behind when the world suddenly opens up for their siblings. I think my favourite thing about this story - and it's mentioned in the interview afterwards, so clearly it's a factor for the author as well - is the belief that not everyone left behind is a Petunia Dursley, that in most cases these unmagical kids will struggle with rejection and acceptance but care for their sibling will ultimately win out over jealousy. And that's what Henry has to deal with, as her little sister reluctantly sets off for a life she's not particularly enamoured of either. Gabrielle would rather stick with science and astronomy, but she's got no more choice than Henry when it comes to her identity, and the way that both sisters learn to live with what they're becoming makes for some very enjoyable reading.