My best friend is extinct

"This is the story of 10-year-old Henry, who has moved with his mother--his father died when he was small--to a snowy mountain town where it has been hard to make friends. Making matters worse is a concussion he sustained when bullies collapsed a snow tunnel onto him. When Henry finds an injured prehistoric short-faced bear, he names him Yarp and, in secret, nurses him back to health. But what creature injured Yarp in the first place? Henry is determined to keep his new friend safe, but this proves to be a difficult challenge with no assistance from adults"--Kirkus Reviews.