Jessica Backman's Death in the Afterlife Series by Hunter Shea

The dead still hate! John Backman specializes in inexplicable phenomena. The weirder the better. So when he gets a letter from a terrified man describing an old log home with odd whisperings, shadows that come alive, and rooms that disappear, he can’t resist the call. But the violence only escalates as soon as John arrives in the remote Alaskan village of Shida. Something dreadful happened there. Something monstrous. The shadows are closing in… and they’re out for blood.