The Widow's Gambit (en Inglés) - Kevin Chong

Seraphina is a ghost of the East End. Clad in black silk and armed with silver lockpicks, she infiltrates the opulent ballrooms of Mayfair as the "Widow Sterling." Her target is the Duke of Moreland, a man whose wealth is built on a foundation of blood and broken lives. But guarding the Duke's secrets is Lord Julian Ashcroft, a man known as the "Black Dog" for his cold efficiency and iron loyalty.

What begins as a lethal game of cat-and-mouse evolves into a desperate alliance when a common enemy emerges from the shadows. From the heights of aristocratic galas to the bowels of a sinking steamship on the Thames, Seraphina and Julian must navigate a web of betrayal and hidden birthrights. As the masks fall away, Seraphina must decide if she is seeking justice for her mother or a crown for herself, while Julian must choose between the law he serves and the woman who has stolen his heart.