Banquet of lies - Michelle Diener

Frightened for her life after her father, a British spy, is murdered, Giselle Barrington flees with the secret document her father gave her for safekeeping. Needing to hide from those now chasing her, and knowing that no one would look for a wealthy young society lady in a kitchen, she takes a job as a cook for a nobleman, determined to use her anonymity to uncover the murderer. Life below stairs gives her a new perspective on the hard realities of servants' lives, even though she's a highly paid one. And when her employer is drawn not only into her investigations, but also to her, they find themselves faced with the power imbalance between servant and master.