What will Tyler Scott do after he finds a boy's skull and the boy's ghost asks him for help?

After Tyler Scott finds the skull, he's shocked when the ghost asks him to help find his dad, who has probably been dead for years. He and his friends Addy and David Jacobson set out on the seemingly impossible quest. They have to work hard to solve the mystery before whoever is watching them does more than just threaten.

In Ghost Boy by Jan Burns, we see these children setting out on a seemingly impossible quest to help a young ghost. Will their friendship hold up after things become dangerous?