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 their teacher. In this process, Soren fights 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... <P>Guardians of Ga'Hoole is a classic in the making -- Kathryn Lasky brings a thrilling new owl world to life. A key theme in the series is friendship: Soren and Gylfie's bond is at the heart of the story. The struggle between good and evil is evergreen and infinitely interesting.