Acclaimed children's book author Cornelia Maude Spelman's memoir of her family springs from a meeting and subsequent friendship with the late, legendary New Yorker editor William MaxwellIn the 1920s, he and her parents had been friends as undergraduates at the University of Illinois at Urbana-Champaign. When Spelman hints at what she thinks of as the failure of her parents' lives, he counters that "in a good novel one doesn't look for a...