I really enjoyed the Hex Hall series. Even with supernatural themes, the books will appeal to a much younger audience, more so with School Spirits. Izzy is a likeable character, she may be able to fight monsters, but she's a girl who just wants normalcy. She has the weight of her missing sister and her mother's expectations on her shoulders and young teens will be able to relate to Izzy struggling with her first crush, trying to relate to her mother while learning the family trade.
It was lacking that certain spark that Hex Hall seemed to provide, but it was a fun, entertaining read that is perfect for young teens and young adult enthusiasts.