Monster Max and the Marmalade Ghost

Max is an ordinary boy, except that he can turn into a monster when he burps... Max and Peregrine are volunteering at an old people's home, when strange things start to happen. One resident is walking on the ceiling, one is riding their wheelchair through walls, and Reggie says his marmalade is haunted (no one listens). Can Max and his friends work out what's happening to protect his family and ...