Black rose - Nora Roberts

Roz Harper is a woman who has lived life on her own terms.
She had dearly loved her first husband. After his death, she had thrown herself into raising their boys, and then into making a business out of her passion for gardening.

Roz likes her life just as it is, and it would take a very special man to convince her to take that leap of faith into love again.
A man like Dr. Mitchell Carnegie, the genealogist she's hired to research the origins of the family ghost, known as the Harper Bride.

Mitch and Roz are drawn together from the start. But the Harper Bride is enraged by the sight of love, and though she may have brought Mitch and Roz together, she will stop at nothing to tear them apart.