Kathryn Caskie 
Duke’s Night of Sin 

This sexy Regency romance trilogy comes to a seductive conclusion with "a dazzling combination of scintillating romance and wicked wit" (Booklist).Knowing it is time to find a bride, the Duke of Exeter is determined to locate the passionate minx who enticed him in a pitch-black library. But how can you find someone you’ve never actually seen? Then, while supervising his young ward’s education, he is irresistibly attracted to her exquisite new teacher. He keeps wondering if they’ve met somewhere before, never suspecting she’s the woman he’s never forgotten after his one night of sin.As a beloved instructress at an exclusive school for young ladies, Lady Siusan Sinclair is a model of deportment. But no one knows her secret-that she fled London for Bath, her reputation on the verge of tatters, her fortune lost. Still, no matter how hard she tries, she can’t forget the knee-weakening kiss of the man who led her astray . . .