Mistress by Midnight

Lady Merryn Fenner is on a mission to ruin the Duke of Farne. A beautiful bluestocking with a penchant for justice, Merryn has waited twelve years to satisfy her revenge against Garrick Farne. Her family name had been tarnished at his hands, her life destroyed. 
For twelve years Garrick, Duke of Farne has kept the secret of what really happened on the night that he killed his best friend, Stephen Fenner, in a duel. Now Stephen’s sister is intent on discovering the truth and putting at risk all those secrets Garrick has protected.
When a disaster traps Merryn and Garrick together, white-hot desire stirs between the two sworn enemies. Merryn's reputation is utterly compromised and she is forced to do the one thing she cannot bear; accept the scandalous marriage proposal of the man she has vowed to ruin.