The rescue - Kathryn Lasky

The owls of Ga'Hoole return in the third book of the series ready to battle new and far more dangerous threats. Based on Katherine Lasky's work with owls, this adventures series is bound to be a hit with kids. Join the owls in their quest to safeguard the owl kingdom from the encroaching evil!

Out of the darkness a hero will rise.

Ever since Soren was kidnapped and taken to the St Aegolius School for Orphaned Owls, he has longed to see his sister Eglantine again. Now Eglantine is back in Soren's life, but she's been through an ordeal too terrible for words. And Ezylryb, Soren's mentor, has disappeared. Deep within Soren's gizzard, something more powerful
than knowledge tells him there's a connection between these events.

In order to rescue Ezylryb, Soren must embark upon a perilous quest. It will bring him face to face with a force more dangerous than anything the rulers of St Aggie's could have devised - a truth that threatens to destroy the owl kingdom.