The Weatherman by Brooklyn Koski

Sibyl is a beautiful young servant girl struggling to survive with what is left of her war torn and her broken family. She grieves for her lost father and worries about survival during the upcoming winter. Can she piece the life that she knew before the war back together? Or is she forced to live with this new, shattered life, hunger and sadness looming close? Additionally, she suddenly finds the attention of her lord’s son becoming both uncomfortable and a little exciting. This shift in their friendship adds to the uncertainty in her unstable world. Will she lose her childhood friend altogether?
Isabel is the pampered princess of the kingdom living in the castle at the center of power and luxury. Why does she long for more freedom and adventure? When her brother, the prince and heir to the throne shares an unthinkable secret with her, will she be able to regain control of her life and return to the safety of the castle? Isabel quickly finds herself involved in the excitement and adventure she wished for, but is it too much for her to handle?
Meanwhile a double crises is brewing in the country, war on one front and the devastating forces of an alien power are wreaking havoc on the land. An impossible figure emerges to manipulate all the important players involved. What are the motives of this unlikely and inhuman being? Will Isabel and Sibyl find ways to overcome their problems, to survive in this ever-shifting world? And what is the identity of the Weatherman?