 Complete the following phrase:  With the assistance of an inner-city Roman Catholic priest, Father ODay, the pair run away, following the maps route leading towards the Blue Ridge Mountains. As their memories begin to return, they realize that they are actually of extraterrestrial origin, their people having come to Earth because their own planet was drifting towards one of its two suns. Their flying saucer was shot down over Hungary, resulting in the deaths of all but Tony, Tia, and Uncle Bené - a non-relative, but one of their own people, who rescued the children from Soviet captivity. The book ties this event to the 