Foundation series

"It is the year 12,020 G.E. and Emperor Cleon I sits uneasily on the Imperial throne of Trantor. Here in the great multidomed capital of the Galactic Empire, forty billion people have created a civilization of unimaginable technological and cultural complexity. Yet Cleon knows there are those who would see him fall--those whom he would destroy if only he could read the future. Hari Seldon has come to Trantor to deliver his paper on psychohistory,...

Foundation: As the Galactic Empire declines, psychohistorian Hari Seldon and his band of psychobiologists form the Foundation, designed to be the nucleus of an eventual ideal universal ruling corporation. - Foundation and empire: The Galactic Empire declines, and a period of disruption ensues, followed by the emergence of the Foundation, creation of psychohistorian Hari Seldon, as a state strong enough to finally defeat the decrepit First Empire....

After years of struggle, the Foundation lies in ruins - destroyed by the mutant mind power of the Mule. But is has been rumored that there is a Second Foundation hidden somewhere at the end of the Galaxy, established as insurance to preserve the knowledge of mankind through the long centuries of barbarism. The Mule failed to find it the first time - but now he is certain he know where it is. And this time the annihilation will be total: no trace of...

Golan Trevize, former Councilman of the First Foundation, has chosen the future, and it is Gaia. A superorganism, Gaia is a holistic planet with a common consciousness so intensely united that every dewdrop, every pebble, every being, can speak for all—and feel for all. It is a realm in which privacy is not only undesirable, it is incomprehensible. But is it the right choice for the destiny of mankind? While Trevize feels it is, that is not enough....