(Hardback)

Against all odds, cubs Stellan, Jytte, Third, and Froya find the key hidden inside the legendary Den of Forever Frost. Now, they have everything they need to destroy the dangerous ice clock--except an army. The cubs must convince the animals of Ga'Hoole to join the fight.

(Paperback)

A stunning new series from Newbery Honoree Lasky set in the legendary world of Ga'hoole. For generations, the noble polar bears have ruled the Northern Kingdoms. But now, their society is on the brink of collapse. Its survival is up to a pair of twin cubs.