Shades of Milk and Honey - Mary Robinette Kowal

In Regency England, Jane Ellsworth of Dorchester is a woman ahead of her time.Not only is she highly skilled in the manipulation of glamour - plucking strands from the Ether to create genteel magical illusions - she's also ambitious for her art, and dreams of being recognised as a glamourist of note in her own right, as men are permitted to. First and foremost, however, a lady of quality must marry well, and alas Jane's ambitions do not extend to her romantic prospects. Compared to her beautiful sister Melody, Jane feels invisible to suitors, and is resigned to a life of spinsterhood.But when her beloved family comes under threat, Jane uses her magical skills to put things right, which attracts the attention of professional glamourist Mr Vincent . . . and unwittingly wanders in to a love story of her own.