A Dangerous Engagement (The Regency Spies of London #3)
Melanie Dickerson

Government agent Philip McDowell is infiltrating a group of cutthroat revolutionaries led by none other than Lady Blackstone and Ratley. Their devious plot is to overthrow the monarchy, and their unwitting pawn is Felicity. Now Philip needs Felicity’s help in discovering the rebels’ secrets—by asking her to maintain cover as Ratley’s innocent bride-to-be.
Philip is duty bound. Felicity is game. Together they’re risking their lives—and gambling their hearts—to undo a traitorous conspiracy before their dangerous masquerade is exposed.