Treachery in the Highlands by Anna Durand

A petty thief on the run in the modern world. A medieval Scots lass who craves adventure. Two worlds will collide…

Forced to flee America, petty criminal Joey Finnegan finds more trouble than he bargained for in the land of whisky and kilts. Then a strange force hurls him backward in time, dropping him into a castle moat.
But a lovely lass fishes him out.
Rachel MacTaggart comes from an odd family. And everyone, from her parents to her great-aunts, wants to know who the goateed stranger in a leather coat is. How he got here. Why he came. What he wants.
Joey can’t tell them, because he has no answers. But that’s not his only problem. A thief in their midst? These people would probably run him through with a sword if he confessed to that fact.
Yet someone or something flung him into this medieval world. The question is why…

Treachery in the Highlands is the second time travel prequel inspired by the bestselling Hot Scots series.