This book is one of 3 books that make up The Robot Novels. Actually, almost all of Asimov's novels are connected (and in an ingenious way, if I may add my opinion), but these three are related closely, because they are telling the story of the same two characters, through no more than a 10 year period. This series is connected to the other books, and so are all the others amongst themselves, but these connections sometimes stretch through dozens of thousands of years. Because I read these three novels after reading a considerable number of the others (in Hebrew or English), I was able to get a very wide view of the story line along the ages, and the different interstellar occurrences. I find that almost all the books are interesting by themselves, but that in whole the totality of his novels create an amazingly vast new universe, with it's own history, and interplanetary politics. Yes, his books are far from being only about spaceship battles and lasers, for there is a great d!
             eal of politics and psychology of humans, and robots.
             And so, all three books are about Elijah Baley, and his robot assistant, Daneel Olivaw. In their time, Earth is no longer the only planet inhabited by human beings. There are also the "Spacer Worlds". Many years before, the people had started to leave earth, and settle new planets. They brought their own ecosystems to the new planets, destroying the little or no microscopic life that was there and making them more Earth-like in nature. Since they could choose, they chose not to bring any harmful microscopic creatures with them, and so the new planets were completely un-infectious and pure. The people who left Earth, slowly became long-lived and healthier, and developed a psychological rejection of the infectious Earth-people. On some Spacer worlds, the people even developed a repulsion of each other, and only meet rarely face to face (instead they use 3 dim
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