Darkness

This book is about a young 13 year old girl named Sarah. She's new at her first public school and she finds a new friend, she realizes that she is acting weird and wants to know what's wrong. Her new friend Cece doesn't want to tell her what's happening. Cece wants to tell her but is threatened by her own body not to tell Sarah! Sarah can't bear to see her friend like this so she tries to help.