She's a servant masquerading as a lady... 

Gillian Beaumont never had a fairytale life: she was left penniless after her father's death, forcing her into service as a lady's maid. Luckily, her mistress is more adventurous than most ladies and soon Gillian is aiding her espionage. One such spy mission forces Gillian to masquerade as a high-born lady to infiltrate a Hellfire Club. But when she falls into the club's trap, she's rescued by gentleman rogue, the Earl of Pembroke. His heated kisses make her long for a different life, but she has a secret that could destroy everything...

He's a gentleman on the outside, but a rogue on the inside...

James Fordyce, Earl of Pembroke, tries to be a well-behaved man—for the most part. A member of the Wicked Earls' Club, he has his fair share of notoriety, but he's longing for the day when he might settle down. A chance encounter with a mysterious beauty leaves him feeling full of hope. When she vanishes without a trace and danger seems to be following her, he knows he must find her and rescue the woman he is determined to make the future Countess of Pembroke. Tracking her down to the seedy halls of a Hellfire Club, he knows he'll have to fight against all odds to save her before it's too late...

Warning: This book contains a woman dreaming of a life she can never have, a hero who's convinced he'll never find the one woman destined to be his and a love so powerful nothing can stop it.