Mark of the Witch (The Portal) by Maggie Shayne

Description

She was born to save what he is sworn to destroy

A lapsed Wiccan, Indira Simon doesn't believe in magic anymore. But when strange dreams of being sacrificed to an ancient Babylonian god have her waking up with real rope burns on her wrists, she's forced to acknowledge that she may have been too hasty in her rejection of the unknown. Then she meets mysterious and handsome Father Thomas. Emerging from the secrecy of an obscure Gnostic sect, he arrives with stories of a demon, a trio of warrior witches—and Indira's sacred calling.

Yet there's something even Tomas doesn't know, an inescapable truth that will force him to choose between saving the life of the woman he's come to love—and saving the world.