The origin of the word robots, although they are not so much robots as golems. Only there are lots and lots and lots of them -- eventually millions. It all starts out well but ends epicly badly. It suffers somewhat from a certain didacticism about technology, Communism, and other themes, that I don't remember in War with the Newts and other Capek books. That said, it is a classic that I've been meaning to read for a long time and am glad I finally got around to it.