A war breaks out in the owl kingdom when an evil group tries to take control of the Great Ga'Hoole Tree. Soren and the other Ga'Hoolian owls must fight to protect their tree and restore peace.Soren's beloved mentor, Ezylryb, is finally back at the Great Ga'Hoole Tree. But all is not well. There's a war between good and evil in the owl kingdom. On one side is a group led by Soren's fearsome brother, Kludd, who wears a terrifying metal mask to cover his battle-scarred face. On the other side are the owls of the Great Ga'Hoole Tree, who must fight to protect their legendary tree from Kludd's attacks.Soren, his friends, and the other owls at the Great Ga'Hoole Tree enter into fierce combat against Kludd's forces. They win a major battle, but warfare will continue in Book #5.

Bestselling author Kathryn Lasky takes flight once more with a brand-new Guardians of Ga'Hoole novel! An owlet hatches out onto Stormfast Island and into a world torn by war. For one hundred years, his people have fought off enemy owls from the Ice Talons, but the tide has turned. An invasion is coming, one the Kielian League won't have the strength to resist. Soon the tyrant owl Bylyric will rule over everything, and no honorable owl will be safe. Only the small owl from Stormfast stands between Bylyric and total victory. Lyze is not very impressive to look at, but he has a wild idea for a snake and owl strike unit that just might give the soldiers of the Kielian League the edge they need.This is his story, the story of an ordinary owl who rose to become Ezylryb of the Great Tree. This is the story of what it takes to make a Guardian of Ga'Hoole.

Fourth title in a mythic adventure series in which the heroes are owls!

Called "elegantly, starkly beautiful" by "The New York Times Book Review, The Siege" is Dunmore's masterpiece. Her canvas is monumental--the Nazi's 1941 winter siege on Leningrad that killed 600,000--but her focus is heartrendingly intimate.

The third book in the GUARDIANS OF GA'HOOLE series, a classic hero mythology, chronicles Soren's quest for his missing mentor, Ezylryb, and battle against his evil brother, Kludd.Now that Soren has been reunited with his sister, Eglantine, he must face his next challenge: making sense of the mysterious disappearance of his mentor, Ezylryb. When Soren discovers that Ezylryb is in danger, he and his friends Gylfie, Twilight, and Digger devise a plan to save the beloved teacher.In this process, Soren must fight a ferocious foe who wears a terrifying metal beak, sharpened for battle. It's not until the confrontation is over that Soren discovers the true identity of his opponent. The metal beaked warrior is Soren's evil brother, Kludd.

"A young Barn Owl named Soren lives peacefully with his family. After he is pushed from his nest by his older brother, his idyllic world transforms into one of confusion and danger, as he is captured by evil chick-snatching owls and taken to the St Aegolius Academy for Orphaned Owls"--Goodreads.com.

In the fifth book in this series, the war between an evil group led by Soren's brother, Kludd, and the owls of the Great Ga'Hoole Tree rages on.In the midst of war, Eglantine unwittingly becomes a spy for Kludd, leader of the Pure Ones (a group of evil owls). She is brainwashed by an owl sent by the Pure Ones to infiltrate the Great Ga'Hoole Tree. Her odd behavior eventually attracts attention, and Soren and his friends vow to find out what's wrong with Eglantine. They ultimately learn what happened and help her reverse the effects of the brainwashing. Kludd continues to battle against the Guardians of Ga'Hoole for control of their tree. In the end, Kludd and his forces are defeated. But his conflict with Soren is not yet over.