Four stories (three of which appeared in the New Yorker) and a novella bring wit, compassion, and dizzying absurdity to facing life and death across generations. In "Things We Worried About When I Was Ten," carefree boys running in apparent midwestern freedom are revealed to be as uncared for by their overburdened parents as they are carefree. "The Longer Grief" is a slow-motion explosion, as one moment in time propels shards of reckoning through...