Wintertide's War — Kate Avery Ellison

Spellwood Academy is under attack.Loyalties are divided.Danger lurks around every corner as each student is put to the test. Who will stand with their half-blooded fellow students and fight back, and who will join the enemy who wants them dead?Kyra finds surprising allies and shocking new betrayals as her friends and foes reveal allegiances and band together against Druisi's army in the Wintertide's War.