What is the author's tone in On Directing Film by David Mamet?

David Mamet presents his theories on film directing with a voice of experience and wisdom based of course on an extensive and successful career. Mamet, recognized as an accomplished writer, brings logic and reason and a dash of humor to his book, "On Directing Film." One of his tenets in making film is the acronym, "K.I.S.S" which stands for "Keep It Simple, Stupid." In writing the book, he has followed this logic and presented a work that is easy to follow and one that succinctly cuts to the point.