Evil Within by Carrie Quesne

Six friends go camping in the Cotswolds of England, not one of them realizing that death is just around the corner. They end up at an old house, seemingly empty, with a story attached to it—a story of a family’s death. Friends together just having fun…or so they think. One by one, they disappear. Only one survives to go into the Witness Protection Program, depending on the police for survival. But who can she trust, when even the cops can be influenced by the evil within?