Earl of Alnwick. Wicked Earls' Club, #29

Lord Niall Jameson, Earl of Alnwick, has more than lived up to his reputation as one of the Wicked Earls. But it is time to settle down and marry an heiress to save the crumbling and heavily burdened estate he inherited from his wastrel father. Not that he wishes to marry. He rather enjoys his own wastrel life. He finds the perfect solution when he rescues one hugely irritating spitfire by the name of Miss Katie Pringle from drowning.
She's a runaway bride. Her wealthy father and even wealthier betrothed are offering an extremely generous reward for her safe return. All Niall has to do is get her back to London and claim his riches. What can possibly go wrong?