Blackthorn by J.T. Geissinger

Twelve years ago, Maven Blackthorn fled her hometown after her mother died under suspicious circumstances. Now, she returns to Solstice, Vermont for her grandmother’s funeral and finds herself drawn into a nightmare: her grandmother’s body has vanished.

The Blackthorn family immediately suspects the Crofts, who are a powerful pharmaceutical family with a bitter feud against the Blackthorns. Maven comes face to face with Ronan Croft, the son of her mother’s suspected killer and the only man she ever loved. Their forbidden past rekindles as secrets emerge and danger closes in.