My Highland Warrior (Warriors of the Highlands Book 1)

Fearsome laird Gabriel MacLachlan must take a bride--Magdalene, his overlord's sister known to be as bonny as any Highland lass but as mad as a loon. Mad Maggie, they call her, and Gabriel has no choice if he wants to repair his crumbling castle. A fat dowry for a madwoman, whose life will be in danger from a family curse as soon as they wed.