ETERNALS Books 1 & 2: Lucy's Nightmare & The Raven Mocker

The Eternals are a superior race of supernatural beingswho have roamed the earth for thousands of years searching for peace. These vampire-like creatures don't require blood to exist. Instead, they absorb the life force from their human victims in order to remain young and powerful. After settling into a new home, Paris (once a scientist and explorer from ancient Greece), Paulo (once a soldier to Nero in the Roman Empire), and Selene (once a handmaiden to Cleopatra in ancient Egypt), discover Lucy, a young, battered wife living in the mountains of post Civil War northern Georgia.
The Eternals find it imperitive to help Lucy out of her critical situation before it's too late. Life then unravels for the Eternals once again as Selene is plagued with puzzling glimpses of the future and a mysterious redheaded woman, Paris is struck down with debilitating headaches that can't be explained, and Paulo vanishes into thin air and can't be found. Soon enough, the Eternals are forced to face off against the Raven Mocker and the Scarlett witches of Savannah, all culminating in a horrifying battle for existence.