Books with title Milton and his world

Will wonders about everything: is there a wall behind the sky? Is blue still blue in the dark? Do you stop getting older when you hold your breath? At summer camp he stares into the starry sky and wonders, "what will happen when my family dies?" Will starts to cry. He talks to his parents and then to his grandparents, learning what long, rich lives they've lived. He studies science, art and music, looking for something that will last. He doesn't find any certain answers, but takes comfort in a saying his teacher repeats: "All good things have an end, except for sausages, which have two ends." Will and His World is a story about a boy who confronts the most difficult questions in life, and who arrives at some surprising answers.