Soren, Gylfie, Twilight, and Digger make a harrowing journey to the Great Ga'Hoole Tree, a mythical place where an order of owls rises each night to perform noble deeds, seeking help to fight the evil afoot in the owl world.

When Soren the Barn Owl is taken from his tranquil kingdom of Tyto, he and his friend Gylfie escape and, along the way, meet two other Barn Owls, Twilight and Digger. The four owls band together to seek the truth and protect the owl world from unimaginable danger.

Nyroc, son of the evil Kludd and Nyra, is forced to fulfill his dead father's destiny and oppress all of owldom, but when doubt grows in Nyroc's heart he must make an ultimate decision between good and evil.

"A great battle is on the horizon and drawing near. In preparation, Soren and his band must fly to the mysterious North Kingdoms to find allies and study the grim art of war. Meanwhile, St. Aggie's has fallen to the Pure Ones. If they are not stopped, they will launch another, more deadly attack against the great tree. And without allies from the north, Ga'Hoole will surely fall."--Cover.

A mysterious blue owl from the Middle Kingdom known as the Striga slowly gains control over Coryn's mind and institutes a harsh new regime that begins to control the learning at the Great Ga'Hoole Tree, where the Band fights to break through to Coryn and force him to acknowledge the Striga's harmful influence.

In this prequel, Ezylryb the Screech owl recounts the story of his life in the Northern Kingdoms--his rise through the ranks of the Killian Army, his brother's betrayal, and his friendship with Octavia the snake, to finally become a Guardian of Ga'Hoole.

"Soren's sister, Eglantine, is falling under the spell of a strange nightly dream. Then, just as Soren notices her trancelike state, Eglantine disappears, and the dreams become a deadly waking nightmare that puts the Great Tree of Ga'Hoole in terrible danger."--P. [4] of cover.

Soren, Gylfie, Twilight, and Digger make a harrowing journey to the Great Ga'Hoole Tree, a mythical place where an order of owls rises each night to perform noble deeds, seeking help to fight the evil afoot in the owl world.

Soren and Coryn read the ancient legends of Ga'Hoole in order to find a way to prevent the victory of evil in their present world. The once-forgotten beginnings and ambitions of the Guardians --as well as some heartbreaks-- are finally uncovered through the inquiry and commentary of Otulissa, the tree's dutiful historian.

Soren and his band fly to the Northern Kingdoms to study the art of war and find allies as St. Aggie's is falling to the Pure Ones.