Forbidden Highlander (Dark Sword‪)‬

Fallon McLeod has gifts any
warrior would covet—fierce strength, unmatched skill, even immortality.
But those gifts have come at a price that puts everyone he loves at
risk. Only when his brother, Quinn, is taken captive does Fallon leave
the seclusion of his Highland home to seek the king's aid. And though
every woman at court would gladly be his for the asking, one alone
causes desire to roar to life within him: beautiful, mysterious Larena
Monroe.

Rumors swirl around the castle about "The McLeod" but
Larena knows the truth. Like Fallon, Larena is searching for a way to
vanquish the evil Druid who wants to wreak havoc on earth. Drawn to
Fallon in spite of her fear, she surrenders to a passion that shocks
them both with its raw intensity. But Larena dares not hope for more—not
when she holds a secret that could turn her fiery Highland love against
her forever . . .