While multi million dollar Superhero movies are commonplace today and rarely fail at the box office, in 1979, Superman the Movie was kind of new, untested thing.
At the time, the DC comics heroes were represented by licensing corporation of America (LCA) and their job is to sell the Superhero license to manufacturers. This rare 1979 booklet painstakingly shows the impact that the DC comics characters had on pop culture in the 1970s and is a really fun window into the late 1970s.