Kidd, almost thirteen, and his adoptive father, who everyone calls Gramps, a recently retired teacher, are pursued cross-country by a wealthy scoundrel named Nivins, who falsely claims Kidd as his biological grandson and has vowed to kidnap him if necessary. The pair travels from one small town to another in Walooma Watooka, their comfortable, big, remodeled, blue school bus. At every stop they find people in need of their assistance and gladly provide...