The strange, maniacal blue owl known as the Striga has been rousted from the Great Ga'Hoole Tree. Nyra, leader of the vicious Pure Ones, is either dead or laying low in some distant land, leaving the tree finally at peace. As if fed by an invisible spring, learning and the lively arts flourish at the great tree and spread throughout the owl kingdoms.
But unbeknowst to the Guardians, in a long-empty cave deep in the Northern Kingdoms two ruthless villains join forces to conjure an ancient evil, an evil that will do their bidding and wreak havoc on the world.

This is volume 15 in Guardians Of Gahoole .

This book has been graded for interest at 8-12 years.

There are 232 pages in this book. This book was published 2008 by Scholastic US .

Kathryn Lasky was born in Indianapolis. She has two grown up children and now lives in Cambridge, Massachusetts, with her photographer husband Chris Knight.