Rook: Exodus (Rook: Exodus #3)

As Rook and Dire Wolf are hunted by the bear warden Ursaw, they need allies to fight back. Dire Wolf takes them to a secret sanctuary called the Oasis, where we meet another enigmatic Warden and his formidable crew. But can they be trusted? And whose side are they really on? Also: If you think you know how sick and twisted Ursaw is, you've seen nothing yet!