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.

The reader is introduced to Soren, a barn owl and the centerpiece of the series. When Soren is pushed from his family's nest by his older brother, he is rescued from certain death on the forest floor by agents from a mysterious school for orphaned owls, St. Aggie's. When Soren arrives at St. Aggie's, he suspects there is more to the school than meets the eye. He and his new friend, the clever and scrappy Gylfie, find out that St. Aggie's is actually...

While Coryn and his companions journey to a wintery realm where mysterious owls live, the king becomes the target of an assassination plot and it is up to Primrose and Eglantine to save him.

The strange, maniacal blue owl known as the Striga has been rousted from the Great Ga'Hoole Tree. Nyra, leader of the vicious Pure Ones, is either dead or laying low in some distant land,leaving the tree finally at peace. As if fed by an invisible spring, learning and the lively arts flourish at the great tree and spread throughout the owl kingdoms.

Owly and Wormy love making new friends, and when they spot an unfamiliar animal flying through the trees, they can't wait to meet her! Unfortunately, Shadow the flying squirrel doesn't want to be friends with Owly because she's afraid of him. Wormy tries to convince Shadow that she can trust Owly, but she's still scared... When Wormy gets stuck high up in a tree, Owly's own fear of flying keeps him grounded. Can Owly overcome his fears? And will Shadow...

Gabe and the other monster hunters arrive in a wildlife management area in West Virginia to investigate reports of a monster called the Mothman--but mostly what they see are owls, until something much larger attacks them in the night.