Tides of Darkness by Andrew Van Wey

Among the ashes some cinders still burn. After the fire of Raven's Valley consumed their community-and the lives of their neighbors-fourteen-year-old Zelda and her uncle Mark are determined to rebuild within Greywood Bay. It's a place of serene beauty and rich history, a bucolic town they want to call home. If only the ghosts would leave her alone. Haunted by the spectral echoes of the dead, Zelda must fight for her sanity while navigating the turbulent waters of adolescence. And her uncle Mark must battle his own demons, both inside out. Alone, they will crumble. Together, they might just have a chance. Because something sinister is rising off the foggy shores of the Lost Coast: an entity beyond time itself, one who has long had her eyes on these lands. Her whispers won't be silenced. Her shadows can't be ignored. And her debts will never be forgiven. For beneath its surface Greywood Bay is built on borrowed fortunes and grim pacts. And soon retribution will wash over the town with Tides of Darkness.