Promised to the Highlander by Blanche Dabney

She’s running late for her wedding. Eight hundred years late.
When Kerry Sutherland falls from a window she lands with a bump in medieval Scotland. Mistaken for the fiancée of the laird’s son, she’s brought before the man she’s supposed to marry, a rugged highlander with arms like tree trunks and eyes that stare straight into her soul.

Callum is the courageous leader of a brutal band of highland warriors. Betrothed to a woman he’s never met, his only desire is to make sure the arranged wedding never happens. Then a beautiful stranger appears from nowhere and his entire world changes. The more time Callum spends with Kerry, the more certain he becomes that she’s his soulmate. But when his past catches up with him he’s forced into an impossible choice. Marry the woman his parents picked out for him and end years of clan warfare or risk everything to be with the broken woman who’s taught him the meaning of true love.