World's End. Wingborn, #6

Aquila lies broken, but the Rift Riders are victorious. They have their home back and the kaz-naghkt have been almost wiped out. But not quite. Yullik ses-Khennik has escaped, and he did not go alone. Not only are there a handful of kaz-naghkt left to threaten the Overworld, but Lady Mhysra Kilpapan has been taken. And her friends will do anything to get her back. With Cumulo and Lyrai in the lead, a small band of Rift Riders will journey into the west for the final showdown bringing Riders, dragons and Yullik together one last time.
World's End is waiting and the fate of the Overworld hangs in the balance. Who will win and who will die?The final Wingborn adventure has begun.