by Gordon Korman

When 12-year-old Cooper Vega moves for the third time in five years, he receives a state-of-the-art smartphone to help him stay in touch with old friends.  He’s had phones before, but this one is buggy and unpredictable.  When a boy named Roderick Northrop communicates with him through the phone, Cooper realizes the phone isn’t buggy at all; the thing is haunted!