4.20 avg rating — 39,595 ratings

"A chess game of the politics of telekinetic power. A most intellectual focus!"

3.97 avg rating — 2,828,669 ratings

3.98 avg rating — 648 ratings

"Who knew that Einstein was a philospher?!"

3.98 avg rating — 130,349 ratings

"Most of this book is not about the alien, but about how people deal psychologically with the *effects* of the alien's power."

4.07 avg rating — 5,666 ratings

"Delves into the psychology and motivations of men in charge of powerful technologies,who must then make practical or moral decisions about power apparently handed to them by aliens."

2.67 avg rating — 3 ratings

"It has a depth of scientific extrapolation from current science. It has intellectual exchanges between people in conversation about the effects of important technological changes on society. Explores in a realistic way the nature of the universe."

4.30 avg rating — 34,278 ratings