ASU Online Catalog
Use Library of Congress Subject Headings such as "Motion Pictures," "Film Criticism" and "Popular Culture" for books about movies. If your movie is famous enough, you can search for the title for books about the movie, or search for the director.
If looking for feature films on DVD (and VHS), perform a Keyword search for "feature films videorecording" and "feature films dvd." You will retrieve a list of all the feature films in DVD or VHS.
You can also find some film scripts in the ASU Libraries' Online Catalog by conducting a Subject search for "Motion Picture Plays."