A Duke In Gentleman's Clothing - The Lindwells Series, #1

A Duke In Gentleman's Clothing Wynndom Patrick Bennett escaped his abusive father, the Duke of Greyhaven, and changed his identity to Mr. Patrick Stanton. For the past decade, he's created a comfortable life, traveling the continent, engaging in philanthropy, and trusting only the family butler with his whereabouts and new identity. When the responsibility for a young girl is thrust upon him, Wynn returns to England, planning to stay in the countryside and act as her guardian.
That is, until a letter arrives with devastating news, and he is forced to return to London to claim a title that was never meant to be his. But returning home means revisiting bad memories and sending his ward into an environment she is not yet prepared for. This leads Wynn to do something he hasn't done in ten years-ask for help. And the only one willing to accept the job is the last woman he would have chosen. After breaking off an engagement that would have furthered her parents' ambitions to have their American daughter marry a titled English lord, Constance Lindwell finds herself abandoned.
Disowned and penniless, she retreats from London with plans never to return. That is, until Mr. Patrick Stanton, businessman and philanthropist, barrels into her life and makes her an offer that could set her up for life. But to accept his offer means to return to the city of her ultimate humiliation with an enigmatic man she is convinced has secrets of his own. Secrets she yearns to uncover.