A sparrow's roar
(Book)

A Knight's tale about duty, duels, driving your sister crazy... all while trying to save the country from a secret that threatens to tear it apart. When a seemingly harmless prank goes wrong, knight-in-training Per of Esterpike watches her sister Elena, famed hero and leader of Lions, murdered by a barbarian horde set on wiping Esterpike off the map. Together with Elena's second-in-command Amelia, Per must impersonate her sister and travel to Unity's capital to convince the Generals of each city-state to provide aid against the oncoming horde. But as Per moves forward on her quest, she comes upon a conspiracy that might just threaten Unity itself!