Possession — Lynne Ewing

VANESSA, Serena, Jimena, Catty, and Tianna are five seemingly ordinary girls from Los Angeles. But the truth is that they are all far from ordinary. They each have a secret power that separates them from others--and makes them
DAUGHTERS OF THE MOON

Serena hasn't been herself lately. She's been having sudden lapses of memory and finds herself acting like a completely different person--one she doesn't like very much. To add to her confusion, she knows that someone has been following her. It all started the night an elderly woman helped her. Now Serena is beginning to wonder: Who was that woman? And what has she done to Serena?