Best five books on writing a screenplay

UCLA’s Professor Richard Walter is the author of Escape From Film School, Screenwriting: The Art, Craft and Business of Film and Television Writing, and Essentials of Screenwriting.

With Anna Blundy at FiveBooks, he discussed the best five books on writing a blockbusting screenplay, including:
Plots and Characters by Millard Kaufman

So, what does Millard Kaufman say in his book?

Kaufman is