Bronwyn Scott 
Confessions of the Duke of Newlyn [EPUB ebook] 

He’s seeking vengeance… But might find something else entirely Knowing his best friend, Marianne Treleven, awaits his presence in a Mayfair ballroom, Vennor, the Duke of Newlyn, must hide his secret-he moonlights as a vigilante in pursuit of his parents‘ murderer! But when Marianne’s journalistic ambition draws her into the vigilante’s dangerous world, Vennor realizes his closest friend is no longer the innocent miss from Cornwall. She’s a brave, daring, sensual woman he’s desperate to protect at all costs…