Under a Wild and Darkening Sky — Linda Ulleseit

Although this is the third book in the Flying Horse Trilogy, it is not necessary to read them in order. Ralf knows he must take over his father's bakery, but is it wrong to want some adventure before he does? New to High Meadow, he is befriended by the beautiful and dangerous Branwen, who has her own goal -- to entice Ralf to help her steal a winged horse and return it to Tremeirchson. Meanwhile, Ralf's sister, Alyna, dives into barn life. Becoming a groom to a winged foal is a lot of responsibility to the horse, to the barn, and to her father, who idolizes the wrong barn leader. Politics, greed, and revenge swirl around the teenaged siblings as they struggle to be true to their family and their future.