The Reddening,

"Nor did it bury the horrors predating civilisation. Ancient rites, old deities and savage ways can reappear in the places you least expect. Lifestyle journalist Katrine escaped past traumas by moving to a coast renowed for seaside holidays and natural beauty. But when a vast hoard of human remains and prehistoric artefacts is discovered in nearby Brickburgh, a hideous shadow engulfs her life." -- Cover.