Then there is the fireplace. Central heating was present in every upper-and middle-class home by the second half of the 19th century. But functioning fireplaces remain to this day a powerful selling point in a house or apartment. I suspect the reason is a deep-rooted love of the fire. Fire was one of the earliest major technological advances for humankind, providing heat, protection, and cooked food . Human control of fire goes back far enough that evolution could have produced a genetic leaning towards fire as a central aspect of human life.

　　Books especially books the average person could afford haven t been around long enough to produce evolutionary change in humans. But they have a powerful hold on many people nonetheless, a hold extending far beyond their literary content. At their best, they are works of art and there is a tactilepleasure in books necessarily lost in e-book versions. The ability to quickly thumb through pages is also lost. And a room with books in it induces, at least in some, a feeling not dissimilar to that of a fire in the fireplace on a cold winter s night.

　　For these reasons I think physical books will have a longer existence as a commercial product than some currently predict. Like swords, books have symbolic power. Like fireplaces, they induce a sense of comfort and warmth. And, perhaps, similar to sails, they make a useful back-up for when the lights go out.

　　46. Authors still published in printed versions will be considered important ones.

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