Time of the Highlander by Ivy Hollins

A Highland Laird. A woman trapped in time. And a mysterious plot that tangles them together… When Brigid’s boyfriend is kidnapped, she has no choice but to go after him - even if it means leaping through time. But eighteenth-century Scotland is a dangerous place, especially when a professional time traveller is determined to hunt her down. Sandy MacLeod has secrets of his own - and he can’t risk sharing them with just anyone. But there’s something special about Brigid, and he’s determined to help her in any way he can. Even if that means losing her. Book 3 in the Stones of Scotland series.