Unravel the Dusk by Elizabeth Lim (Author)

Maia Tamarin's journey to sew the dresses of the sun, the moon, and the stars has taken a grievous toll. She returns to a kingdom on the brink of war. Edan, the boy she loves, is gone--perhaps forever--and no sooner does she set foot in the Autumn Palace than she is forced to don the dress of the sun and assume the place of the emperor's bride-to-be to keep the peace. When the emperor's rivals learn of her deception, there is hell to pay, but the war raging around Maia is nothing compared to the battle within.