Our Last Days in Barcelona by Chanel Cleeton

Barcelona, 1964. Exiled from Cuba after the revolution, Isabel Perez has learned to guard her heart and protect her family at all costs. After Isabel’s sister, Beatriz, disappears in Barcelona, Isabel goes to Spain in search of her. Joining forces with an unlikely ally thrusts Isabel into her sister’s dangerous world of espionage, but it’s an unearthed piece of family history that transforms Isabel’s life.