Witch

I really liked the book Witch by Nancy Holder and Debbie Viguie. Holly Cathers is on vacation with her mom, dad and best friend Tina. They are white water rafting when suddenly they go under the water. Soon Holly wakes up in a hospital and is told that her mom and dad were killed as well as Tina and the instructor. Holly has no family, but Barbara, Tina’s mother, offers to take her in. But Holly’s aunt Marie-Claire shows up and says that she can live with them, even though Holly has no idea who they are. Holly chooses to live with Barbara until Barbara is in an accident herself.
Holly goes to live with Marie-Claire and meets her two twin cousins, Amanda and Nicole. Soon she sees Nicole and Marie Claire doing odd things. And her wishes are coming true, at least the ones she whispers to her cat that the twins have given her.
Soon Nicole, Amanda and Holly are closer than ever, seeing they have the power to do whatever they please.