A Duke Under Her Spell by Emma Linfield

Truly, there is magic in fairytales. And in her eyes, he found his own…
For as long as Marybeth Wright could remember, the imposing ruins of the ancient castle had always been a place of comfort. With knowledge of herbs and a small cottage passed down to her from her late grandmother, she spends her days in the quiet seclusion of the woods.
For Felix Hulford, Duke of Arkley, curing his ailing mother is his life’s purpose. Growing increasingly desperate, he decides to enlist the help of the old sage of the forest, only to discover that there’s nothing old about the striking healer that appears before him.
But she seems to be carrying a curse, for her arrival triggers a series of baffling happenings. Determined to discover who is behind the attacks on his sick mother, Marybeth and Felix come face to face with their worst fears.
And it all seems to be connected to Marybeth’s parentage and Blackleigh Castle’s fabled treasure…