PG is getting on in years, and he bought a brilliant cherrywood cane to help him walk. PG named the cane Harvy, and the two became great companions. The special thing about Harvy is that he can talk. He has the inquisitive mind and vivid imagination of a child and a special curiosity about sciences. The story begins at JFK airport where Harvy is entranced by escalators, and he wonders where the moving stairs go once the basement...