Bedding the Highlander by Sabrina York, James Patterson

Only a Scot can steal her heart.

There’s nothing ladylike about Katherine Killin. She’s a spitfire who cannot be tamed. To rid himself of her, and to honor a truce set by the Duke of Glencoe, her father agrees to wed her to his clan’s mortal enemy, Ben Rannoch. But when Katherine meets the enticingly masculine Kirk Rannoch, brother of her betrothed, she suddenly craves domination.