To curl up with children and a good book has long been one of the great civilizing practices of domestic life, an almost magical means of cultivating warm fellow feeling, shared in-jokes and a common cultural understanding. Harvard professor Maria Tatar has written of its origins in medieval fireside storytelling, “before print and electronic media supplied nighttime entertainments.”

Certainly in the modern era there is something quaint about a grown-up and a child or two sitting in a silence broken only by the sound of a single human voice. Yet how cozy, how impossibly lovely it is! Unlike tech devices, which atomize the family by drawing each member into his own virtual reality, great stories pull people of different ages toward one another, emotionally and physically. When my children were small, I would often read with my eldest daughter tucked in by my side, the boy draped like a panther half across my shoulders and half across the back of the sofa, a tiny daughter on either knee, and the baby in my lap. If we happened to be on one of our cycles through “Treasure Island,” Robert Louis Stevenson’s swashbuckling classic, my husband would come to listen, too, and stretch out on the floor in his suit and tie and shush the children when they started to act out the exciting bits.

“We let down our guard when someone we love is reading us a story,” Ms. DiCamillo says. “We exist together in a little patch of warmth and light.”