Stardust in Their Veins

Princesses Beatriz and Daphne have lost their older sister Sophronia, but their mother's grand scheme of taking the continent of Vesteria is far from complete. With the country of Temarin now under the Empress's control, only the nations of Cellaria and Friv remain free from her rule. In Cellaria, Beatriz fears for her life after being usurped by conniving cousins Nico and Gigi; in icy Friv, Daphne continues her shaky alliance with the rebels even as she struggles to stay a step ahead of them. With enemies around every corner and the stars whispering of betrayal, Daphne and Beatriz can't trust anyone-- even each other. -- adapted from Goodreads and jacket