Exile takes an even more darker twist in the Guardians of Ga'hoole when The Striga, a blue Dragon Owl who saved Soren's youngest daughter, Bell, and asked in return to stay and teach his ways to the owls of ga'hoole.
Slowly The Striga tries to inch closer in his friendship with the king of the tree: Coryn, as Coryn is even more slowly losing control over the Ember of Hoole's power. Even worse than that, books and ancient records detailing very early points in owl history, are being burnt, as a part of "cleansing from earthly possessions and vanity". The blue owl has one thing standing in his way from starting a cult: the band. As Soren, Gyflie, Digger, and Twilight figure out what is going on, poisoned by the Ember and Striga, Coryn sends a message to them as they are on their way home, banishing them, never to return to the Great Ga'hoole Tree, to stay in exile.
But The Striga isn't done. Finding ways of accusing the owls of treason with hard evidence, The Striga orders that band is to be tracked down and imprisoned by their own friends of the tree . Hopeless the band separates hoping to meet again with allies to free Coryn from The Striga's spell.
I have to say though, I may have been slowly loosing interest in the series a little but the further into the series I go, the darker the books get, introducing things like references to cults, black magic, and demonic practices, but thankfully the author is able to keep a balance between the to facts of life with good and evil.