Roger Ebert has been writing film reviews for the Chicago Sun-Times for over four decades now and his biweekly essays on great movies have been appearing there since 1996. As Ebert noted in the introduction to the first collection of those pieces, "They are not the greatest films of all time, because all lists of great movies are a foolish attempt to codify works which must stand alone. But it's fair to say: If you want to take a tour of the landmarks...