From The Grey House, Book One:
Not wanting to be beaten yet again, Natalia gritted her teeth. If only Bethany wasn’t in danger… but Vincent was taking care of that; she had to play along until the vampire could act. Natalia, her mother’s face swimming before her, reached around her neck to the clasp. Sighing, she undid the clasp but didn’t move her hands. The necklace had been around her neck since age ten. She still remembered the day her mom showed her how to make it and the songs she needed to sing to weave her will into the beads. She felt something unwinding in her head. Natalia suspected it might be the control she had over the people she hypnotized.
Cat Stark 