The most efficient way to find out what books there are about a filmmaker is to search a library catalog using a subject search. Choose the subject search tab and enter the filmmaker's last name first.
The results will show you more specific subject headings. Using the "Criticism and Interpretation" heading is one way to weed out books that are strictly biographies. If you want to see the biographies too, use the main heading for the filmmaker's name.
You can also try searching in WorldCat, Google Books, and other sources recommended on the Books tab of this guide.