Tharaen by Hazel Hunter

A detective on a personal mission won’t stop—even when she falls into the arms of a gorgeous medieval highlander.

Lieutenant Diana Burke will not give up. Though her missing person case had gone stone cold, something about the disappearance of Kinley Chandler doesn’t make sense. But the last place the detective expects to find her is the highlands of medieval Scotland.
Bodyguard Tharaen Aber needs another security complication like he needs the plague. But the ingenious lass he catches sneaking around Dun Aran castle couldn’t be more opposite. As skilled a tracker as he’s ever seen, she lends her aid at every opportunity.

Unfortunately for the giant highlander, the complications she brings to his heart aren’t nearly as easily solved.
But not all eyes see Diana for the good she brings. In fact, the druids demand that she leave and are determined to make it happen.