The Summoning — Melanie Jackson

Pendlebrook is besieged. Under the cover of a supernatural storm, the sisters have decided what must be done about the deodand. Kept in the dark about the sisters' plans but plagued by prophetic dreams, Abigail and Michael have found someone out in the snow, a policeman from Florida who may be a possible ally against the other things that are also lurking in the dark tempest. And they desperately need a friend because Abigail no longer knows whom to trust.