An Unexpected Countess (Secret Lives of the Ton, 3)

 The Earl of Hartwick delights in scandalizing the ton with his behavior. But it's his turn to be scandalized when, on an escapade, he bumps into Miss Sarah Forrester--in the rain, at night, on a rooftop! Sarah is hunting for a diamond, and the last thing she needs is the infuriating Hart distracting her. But he's looking for the jewel, too! They may be rivals, but the sparks between them are uncontrollable. And soon Sarah finds herself longing for another treasure--becoming Hart's countess!