Wolf Pack (Highland Wolves of Old #1)
Terry Spear

Alasdair is the wolf pack leader of his Highland clan, in the middle of adding fortifications to his castle when he spies what he thinks is a small Viking longboat—which can mean raiders and a fight. But what he discovers is two adult wolf females, a nearly grown male, and a female and male bairn on their shores. He can’t imagine the family making the treacherous journey to his land all on their own, but he’s captivated by Isobel, the woman who led her people to what she hopes will be safety.
Not everyone in his pack welcomes having Vikings living among them though. And Isobel is a wild and unpredictable woman, which fascinates him all the more.