Harrington, Anna (Romance fiction writer). Dukes of darkness #1

"Devlin Raines, Duke of Dartmoor, has worked hard to put his father's sins and his life as a former mercenary into the past. He's saved the family's reputation, kept his mother and sisters safe, and is on the verge of a respectable-if loveless-marriage. His future seems on track--until a mysterious, beautiful woman inverts his world...a woman who can only be a ghost. Peyton Chandler is dead to the world. When assassins attacked her family's carriage ten years ago, killing her parents and attacking her, she faked her own death to stay alive. But now she's returned to London to seek revenge against the man she believes was responsible...Devlin Raines. Only the more time she spends with him, the more everything she thought was true falls apart. And before she knows it, her only safe path to finding answers depends upon her ability to trust the one man she swore to destroy." --