Demon Blood (Vampire in the City) (Volume 5)

Emma Hammond has faced many challenges in the modern vampire world, but when she finds events across the city spiraling out of control as supernatural beings are drained of power in mysterious accidents, it may prove to be too much for her. At the same time, babysitting a teenage witch may rob Emma of her patience as she desperately tries to get to the bottom of the situation before she and her friends are de-powered.