The Duke of Daring (The Untouchables #2) by Darcy Burke

Miss Lucinda Parnell is out of money, a dismal failure at the Marriage Mart, and she’d just as soon leave Society far behind. Desperate to earn funds to retire with her grandmother to the country, Lucy disguises herself as a man to gamble in London’s hells. But the Earl of Dartford, an Untouchable she never imagined speaking to let alone spending time with, is onto her in a trice. When he insists on joining her, Lucy fears her desire to remain an independent woman is destined to go up on flames.

As a boy, Andrew Wentworth, Earl of Dartford lost his family to illness, leaving him a hollow shell. Obsessed with conquering one adventure after another to fill the bitter holes inside of him, Andrew has set his sights on parachuting. Nothing will stop him from trying to achieve his goal—not the hazard of death and certainly not a woman who’s gotten far too close. Love is the one risk he doesn’t have the heart to dare.