Publisher Annotation: Izzy's sister has been acting strange. Izzy knows that something is going on with her twin, Grace; hurrying off to hang with other kids, avoiding her at school, and going to bed earlier than usual. When Izzy learns that her twin sister has been sneaking off at night to hang out with the mysterious Midnight Society, she surprises them at their night of storytelling and threatens to tell their parents about Grace's new hobby. But...