The Robot series is a series of thirty-seven science fiction short stories and six novels by American writer Isaac Asimov, published from 1940 to 1995. The series is set in a world where sentient positronic robots serve a number of purposes in society. To ensure their loyalty, the Three Laws of Robotics are programmed into these robots, with the intent of preventing them from ever becoming a danger to humanity. Later, Asimov would merge the Robot series with his Foundation series. Source: Wikipedia (en)