Book Fair

Today when I was in the school book fair, I  found a really interesting book about a girl who is immortal, she is a witch, she died when she was young and now that she lives she gets back to a new school knowing that she has been graduated long ago. She knows everything from many years ago because she has been living for a long time , and there is a girl named Emma that need her help and she  will help her in her problem because Emma's stepsister is conniving to the core.