Extinction (Planet Urth, #6)

Avery thought she was living in a time of peace. She thought that her family and friends were finally safe and free to live a normal life.
But all of that changed in the space of a breath…
On the day of a celebration commemorating ten years of peace between Urthmen and humans, Avery’s world explodes into chaos. Attacked and forced to flee Cassowary, she must fight to survive in hopes of finding her family.
If they live...