The Highlander's Viking Bride: Book 2 in the Hardy Heroines series
Cathy MacRae, DD MacRae

Katja’s chance to escape her father’s harsh treatment appears to be too good to be true. But becoming Lady of a clan that despises her because she’s a Sinclair, doesn’t make her life any easier. When the attacks turn deadly, she fights her way out, making a dangerous passage to the Shetland Isles for refuge with her Viking family.
Calder and Katja’s marriage, built on mistrust, rushes quickly into disaster. As Calder seeks to repair the damage, Katja discovers not another enemy, but a husband who pledges a new beginning.