In "Rainbows End" by Vernor Vinge, the world has advanced technologically, but Robert Gu is struggling to keep up. After undergoing medical treatment to overcome Alzheimer's, Robert must reconstruct his identity amidst a rapidly changing society.

As augmented reality dominates everyday life, Robert finds himself at odds with the younger generation who effortlessly navigate the digital realm. With his granddaughter, Miri, as his guide, Robert starts attending a futuristic school where he must relearn skills and adapt to new technologies, all while grappling with his own fear and uncertainty.

In this future world, powerful individuals and organizations vie for control and manipulate the masses through the media. Robert becomes entangled in a dangerous conspiracy when a digital virus, capable of crippling entire cities, is unleashed. As he races against time to find a way to halt the virus, Robert discovers surprising allies and confronts his own limitations.

"Rainbows End" is a gripping exploration of identity, technology, and the power of human connection in a society driven by virtual reality. Vinge's masterful storytelling showcases the resilience of the human spirit in the face of rapid technological advancements.