"The Obsidian Curse" by Aiden James

The Cades Cover series- book four. More than a year has passed since shaman John Running Deer and his equally gifted granddaughter, Evelyn Sherman, battled Brigindo and Teutates’ other three siblings in Cherokee, North Carolina.At the time, John and Evelyn prayed this would be it for dealing with violent ancient entities that supersede the normal realm of ghosts and other mischievous spirits. They naively equated the Hobbs family’s return to peaceful lives in Colorado as the end of their own misadventures with the supernatural.They couldn’t have been more wrong.When the sudden appearance of an obsidian spearhead fused to fossilized fingerbones shows up at a brutal crime scene in western North Carolina, where six young adults have been horrifically slaughtered, John and Evelyn are soon pulled back into the realm they had hoped to avoid revisiting. But this time it is an entity quite familiar to them—a long-feared demoness from their Cherokee heritage: Utlunta... better known as Spearfin