I once was lost

A/U 3rd year rewrite. Will things go from bad to worse when a weird foreign stranger knocks on the door of Privet drive in early summer 1993? How will Dumbledore react when all of his carefully laid plans go arse over tin cans? All Harry knows is it can't be any worse then living with the Durselys, right? Noncan, OC, lotsa worldbuilding and my odd sense of humor.