The Phantom of Drury Lane (The Scandals and Scoundrels of Drury Lane #5)
Kate Bateman

Their one, impulsive kiss five years ago led to her humiliating rejection, so the fact that she’s never been able to forget the handsome scoundrel is vexing indeed.
When Arden challenges her to uncover the identity of the mysterious Phantom of Drury Lane, Lucy can’t say no—but her snooping might just push them both past the point of no return . .