Devil's Highlander — Veronica Wolff

After Scotland's civil wars, the orphaned brothers and sisters of the MacAlpin clan reclaimed the abandoned Dunnottar Castle as their birthright. Hardened in battle and haunted by family secrets, these fiery Highlanders must rely on each other as they right the wrongs of their troubled history.

Before she can give herself to him, he must forgive himself.

Cormac MacAlpin lost his innocence too young -- he's always blamed himself for the kidnapping of his twin brother, Aidan. He turned away from his childhood friend, Marjorie Keith, denying the prospect of happiness with the young woman who loved him.

Now a tormented war hero working as a fisherman, Cormac is speechless when Marjorie comes to him with an appeal for help...a poor city boy she's been caring for has disappeared, reminding her of long-lost Aidan. Their bond of shame once thwarted a budding romance and threatens to again -- but Cormac and Marjorie are adults now, with needs too powerful to keep locked away...