Blood Magick by Nora Roberts
Branna O'Dwyer has a rich and remarkable life. Her little shop in County Mayo is thriving and her close circle of friends and family have found love and happiness. But Branna's own heart remains closed - to protect herself and the man she loves from a terrible threat.
She reached out once to Finbar Burke - and it almost destroyed them both. Fin and Branna have both inherited a gift for magic, but Fin shares his blood with an old and terrible enemy. And so the two friends have kept their distance, both secretly yearning for the impossible.
That distance has kept them safe - and unhappy. But as a final battle draws close, Branna and Fin are brought irresistibly together. And while they succumb to the heat between them, there can be no promises for tomorrow . . .