The Talisman — 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

Maggie's time on earth as mentor to the Daughters of the Moon is running out. Before she can name her successor, Maggie reflects on her incredible ages-old journey, and her girlhood in ancient Athens. Her father was a great warrior, but it was Maggie (known then as Penelope) who chose to battle the greatest enemy of all. After seeing the Atrox and its shadowy followers steal the soul of an innocent man, she takes a vow to help cleanse the world of its evil. But in doing so, Penelope risks losing the soldier she loves and seeing her sister succumb to the dark side. . . .