The Pirate's Duchess — Katherine Bone

Duty forces him to take on the pirate code, but honor brings him back. Prudence, Duchess of Blackmoor, has one desire -- to be happy again. After struggling to overcome the horrifying death of her husband, she accepts an earl's offer of marriage, confident she's taking a step in the right direction. But demons, refuse to die, and Prudence finds herself caught in an intricate web of deceit that threatens the very foundations of all she holds dear. Tobias, the Duke of Blackmoor, crosses the line when an assassination attempt on him fails. To restore the reputations of friends under attack by the same villain, and ensure his wife's safety, he stages his own death, becoming The Black Regent, a notorious pirate bent on brandishing justice, never thinking he'd survive. But to his amazement, he has, and now the darkest-kept secrets are not worth losing the duchess his wife has become.