Between the Devil and the Duke by Eva Devon

Annabelle Winter knows the hells of East London. The daughter of a conman and fallen lady, she’s seen darkness that most could never imagine. After her parents’ deaths, she finds herself in a workhouse willing to do almost anything to escape the streets. When her uncle rescues her, her dreams seem to be coming true. But her uncle has a wicked plan. Now, entrapped by his licentious and illegal gaming club, Annabelle’s fate is to be the mistress of the Prince of Wales, a pawn used to bring power to her uncle. But she is no damsel in distress and when she meets a dangerous duke in the misty night, she determines to take her fate into her own hands. But will this duke turn out to be the devil?
Determined to avenge his sister’s brutal attack, the Duke of Ardore is after a small group of men who all revolve around an illegal gambling club. There he discovers a woman whose soul must be as black as her uncle’s, but Ardore cannot escape how drawn he is to Annabelle, or how his soul seems to recognize hers. In a twist of events, she is thrown into his keeping and his life. But the devil inside him is strong and he must decide if vengeance at any price is more important than love.