The Death of Mercy Willow. Mercy Willow, #6

She thought she could bury the past. But the past has been waiting to bury her. Mercy Willow came to Cornwall to escape the horrors of her former life. Now that life is catching up with her - one haunted house at a time. Summoned to a seemingly ordinary property, Mercy quickly senses something is off. The ghosts inside aren't strangers. They know her. They remember her. And what they reveal forces Mercy to confront a part of herself she thought was long buried - before she was ever Mercy Willow. As old identities resurface and dark memories claw their way into the light, Mercy is plunged into a battle against forces far more personal than anything she's faced before.
But it's not just her past that threatens her. Something else lurks in the shadows of the house, something small, silent. and absolutely lethal. To survive, Mercy must face a reckoning years in the making. And the cost might be her very soul. The Death of Mercy Willow is the sixth book in the Mercy Willow series, a darkly psychological supernatural saga set in the mist-shrouded corners of Cornwall.
This book ends on a cliffhanger. Readers are strongly advised to begin with the first book.