The Duke's Secret Heir (Harlequin Historical)

"This, madam, changes everything." 
Years ago, in the Egyptian desert, Ellen Tatham fell wildly in love and exchanged vows with Max Colnebrooke. But, when made to believe Max could not be trusted, she fled… Now, Max is back in England to take up the reins as Duke of Rossenhall. And when he spies Ellen at a ball, the sparks are hard to contain! Little does Max know, though, that Ellen has a secret… And soon, he must learn to embrace an unexpected heir, and an unexpected—and disconcertingly defiant—duchess!