Rainbow's End by Vernor Vinge

In a world enlarged by augmented reality, where smart clothes and smart lenses add layers of context and metadata to your experience, those who came to this experience late in life are at a disadvantage compared to the younger generation. Our foil in this story is Robert Gu, recently cured of Alzheimer's, who is struggling to re-integrate with this society. His children and their friends introduce him to this world, with mixed results. One symbol of this change is the effort to digitize all the works in the University Library – an effort that will free the world's knowledge to be used by all, at the cost of destroying the books themselves.