The Duke's Captive Princess (Sovereign Sinners)

Abandoned on the side of the road after her frightful ordeal with bandits, Elizabeth is left to the mercy of a dark Irish Duke. Mistaken for a thief, the Duke locks her away in his tower after an heirloom has been stolen from his castle and quickly Elizabeth discovers how dangerous the world can be. Left to the mercy of this mysterious Duke, she discovered something in her that is far more dangerous than anything he might threaten and fears the passion that is growing inside her. Elizabeth must do what she can to return to the safety of her father’s home in London before she surrenders herself to the Duke’s desires.
Duke Hugh Henry Vladimir Kavanagh is a man not accustomed to being crossed and when a precious heirloom is stolen from his castle he sets out in pursuit of the villain, but finds a maiden instead. Dirty and alone he mistakes her for the thief, but quickly discovers his mistake only to be distracted by the overwhelming desire he has for the maiden. Unaware that the maiden is the daughter of an acquaintance in London, he locks her away in his tower for safekeeping, but soon discovers that his passion for her unlocks a weakness in him that renders him powerless to her charm.