At first, only a few things are known about the celestial object that astronomers dub Rama. It is huge, weighing more than ten trillion tons. And it is hurtling through the solar system at inconceivable speed. Then a space probe confirms the unthinkable: Rama is no natural object. It is, incredibly, an interstellar spacecraft. Space explorers and planet-bound scientists alike prepare for mankind's first encounter with alien intelligence.
The Overlords appeared suddenly over every city - intellectually, technologically, and militarily superior to humankind. Benevolent, they made few demands: unify earth, eliminate poverty, and end war. With little rebellion, humankind agreed, and a golden age began.
"Still a classic of visionary science fiction"
Webmind - the vast consciousness that spontaneously emerged from the infrastructure of the World Wide Web - has proven its worth to humanity by aiding in everything from curing cancer to easing international tensions. But the brass at the Pentagon see Webmind as a threat that needs to be eliminated. Caitlin Decter-the once-blind 16-year-old math genius who discovered, and bonded with, Webmind - wants desperately to protect her friend. And if she doesn't act, everything - Webmind included - may come crashing down.