Foundation and Earth

Isaac Asimov's Foundation series, the first of which was published in 1942, are among the great masterworks of science fiction, an ingenious blend of nonstop action, daring ideas, and extensive world-building that chronicle the struggle of brave men and women determined to save a damaged Galactic Empire from collapse. However, they also chronicle a greater struggle: that between two powerful psychic entities, one good and one evil, who are battling for human survival. Golan Trevize, the former Councillor of the First Foundation, has chosen the side of reason and logic: a superorganism called Gaia whose common consciousness is so intensely united that every dewdrop, every pebble—in short, every organism—can speak for all and feel for all. Trevize feels this is the right choice for mankind's destiny. But can he be sure? Trevize believes that the answer lies at Earth's faraway roots if it still exists—a quest he must pursue in order to save civilization from invaders from beyond space-time itself.