Amulet 4: The Last Council – Kazu Kibuishi

Emily and her friends think they’ll find the help they need in Cielis,
but something isn’t right. Streets that were once busy are
deserted, and the townspeople who are left live in crippling fear.
Emily is escorted to the Academy, where she’s expected to compete
for a spot on the Guardian Council, among the most powerful Stonekeepers.
But as the number of competitors gets smaller and smaller,
a terrible secret is slowly uncovered – a secret that, if left
buried, means the certain destruction of everything Emily fights
for…