Guardians of Ga'Hoole by Kathryn Lasky is an interesting new series reminiscent of Animorphs.

Book 1: The Capture introduces us to the main characters Soren, Gylfie, Twilight and Digger who have all been captured by other owls claiming they are orphans. There they are brainwashed to be almost slaves to these elder owls but Soren & Gylfie manage to escape but at a cost to other owls who try to help them. Once they escape they find Twilight and Digger and together band together to find the lost world of Ga'Hoole where they think their families may have hidden.