Isaac Asimov is a renowned science fiction author, best known for his Foundation series and I, Robot. He was born in Russia in 1920 and moved to the United States in 1923. Asimov wrote or edited more than 500 books and an estimated 90, 000 letters and postcards. He is considered one of the most influential science fiction writers of all time. Asimov's works have been adapted into several films, television shows, and video games.