A cold-hearted Duke. A wallflower with a secret ledger. And a marriage that was never supposed to be a love match.Arthur Penhaligon, the Duke of Marwick, is a man of stone. Known as the "e;Iron Duke,"e; he has spent years rebuilding his family's shattered legacy with ruthless logic and zero room for sentiment. When he finds himself on the brink of financial ruin, he calculates a final, desperate move: a marriage of convenience to a woman who will provide the capital he needs without demanding his heart.