The Roots of Vengeance. Blood and Shadow Series, #4

The Hollow is dying, but its hunger is not yet finished. For generations, the Whitthorne family has been bound to a curse buried deep in the roots of the land-an ancient force that feeds on blood, fear, and fire. Jerica Whitthorne has spent her life running from that shadow, but when the Hollow awakens with a voice that calls her name, running is no longer an option. Alongside her sister, Maeve-whose magic is as wild and untamed as the forest itself-and Oliver, a soldier scarred by his own battles, Jerica must face the darkness that has haunted her bloodline for centuries.
The Hollow is more than a monster; it is a mirror of everything Jerica fears becoming. To end it, she will have to burn through the lies, the curses, and the past that shaped her. But the Hollow does not die easily. And when its final heart is revealed, Jerica will have to decide: will she sacrifice herself to save what remains, or risk letting the darkness take everything she loves? Where blood and roots intertwine, and where fire dares to bloom, a legacy will either be destroyed-or reborn.