#1 New York Times graphic novel bestseller! Avatar Aang and friends honor an Air Nomad holiday that hasn't been celebrated in over one hundred years. But when cryptic visits from the spirit of Avatar Yangchen lead Aang to a refinery operating on land sacred to the Airbenders--they soon find themselves in peril as a dangerously powerful ancient spirit awakens with vengeance and destruction on its mind! This omnibus collects The Rift parts 1-3, continuing the long-running official continuation of the hit Nickelodeon animated series Avatar: The Last Airbender!