A choice of gods
One night in July, 2135, there were some eight billion people on Earth! The next morning there were perhaps 400. There was no clue to what had happened to the world's population—but, over the centuries that followed, still stranger things occurred.

The human lifespan now stretched to millennia instead of decades, and much of the remaining population developed the ability to move at will among the stars—and abandoned their homeworld for a life in deep space.

Then, after 3000 years, a star-rover discovered what had happened to Earth's original inhabitants—and that they were coming to reclaim their heritage. Those who had stayed behind knew, with a growing fear, that the mystery of what had been done to Earth and why was about to be solved... in a way that would change humanity forever.
American Science fiction, Robots, Indians of North America, Fiction, Androids
Clifford D. Simak
Clifford Donald Simak (August 3, 1904 – April 25, 1988) was an American science fiction writer. He won three Hugo Awards and one Nebula Award.The Science Fiction Writers of America made him its third SFWA Grand Master,[4] and the Horror Writers Association made him one of three inaugural winners of the Bram Stoker Award for Lifetime Achievement.[5] He is associated with the pastoral science fiction subgenre.