This book really took me back to being in 6th grade, starting out middle school. I imagine this would be highly relatable especially for middle grade girls. There are also mentions of the covid pandemic and references to modern media, so I think this book will serve as a bit of a time capsule for this specific early 2020s time period. It takes a long time for the horror elements to show up, but they are there. The real story though is about the difficulty of navigating adolescence and an "invisible" illness.