The Lost Sisters (The Folk of the Air, #1.5)

In this companion novella to the New York Times bestselling novel The Cruel Prince by Holly Black, sometimes the only difference between a love story and a horror story is where the ending comes... While Jude fought for power in the Court of Elfhame against the cruel Prince Cardan, her sister Taryn began to fall in love with the trickster Locke. Half-apology and half-explanation—it turns out that Taryn has some secrets of her own to reveal.