Ghost of Spirit Bear by Ben Mikaelsen

The Ghost of Spirit Bear: Cole Matthews was a violent kid, but a year in exile on a remote Alaskan island had a way of changing his perspective on things. After being mauled by a Spirit Bear, Cole started to heal. He even invited his victim, Peter Driscal, to join him on the island and they became friends.But now their time in exile is over, and Cole and Peter are heading back to the one place they’re not sure they can handle: high school. Gangs and violence haunt the hallways, and Peter’s limp and speech impediment make him a natural target. In a school where hate and tension are getting close to the boiling point, the monster of rage hibernating inside Cole begins to stir.