Warriors Of Ga'Hoole Book Two: Fire At The Lake

Hagsfiends have come back from the dead.
The owl world is completely flabbergasted, as they had never seen anything like this before. However, Hollypaw knows who has.
And so, Hollypaw, King Hoole, Blacksmith Theo, Ice, Princess Rachael and Prince H'rathruyan go on the one month journey to the four Clans by the lake: ThunderClan, RiverClan, WindClan and ShadowClan.
Although Hollypaw is ecstatic to see her clanmates have missed her, there are other dark forces afoot.
The son of Breezepelt and Furzepelt of WindClan.
As the avians and leaders dig further into this mystery of dead coming back to life, Hollypaw and H'rathruyan discover another evil plan that may somehow tie in, however, they will have to act fast.
Because the lake is about to go up in flames.