What the lady's maid knew
(Book)

"Imagine a London where magic is real... real, but feared. This is Eliza Braxton's London, and she has always accepted her place in it gladly. As one of the Riftborn, her magic has relegated her to the servant class, where she dutifully serves as the lady's maid in one of the most powerful households in the country. There, she uses her remarkable powers of persuasion to keep Elder Hallewell's rebelious daughter in the path to an arranged match of power and prosperity. Eliza has never questioned here loyalty... until now." -- Publisher's description.