The Emerald Domino

Lady Sophia Efffingham runs away to London rather than be forced into marriage with her weak-chinned cousin Theo. Until she turns eighteen, she's under the thumb of her greedy aunt and uncle and can't claim her fortune and the right to control her destiny. Without resources, she's forced to masquerade as a maid to the handsome Earl of Bekam until her birthday.
Sophy doesn't expect to fall in love at first sight with the earl, and she didn't plan on the risky masquerade she falls into. But she's determined to save the earl from marrying a society beauty out to snare the earl only for his money. Disguised as the Emerald Domino, she risks everything to sneak into masquerade balls and warn the earl.
The earl becomes intrigued with this mystery lady and begins to search for her. But Sophy's relatives find her first and kidnap her, returning to their secluded home in Gloucester. The only person who can save her is the earl. But will he discover her identity and location in time?