In the mid 90s, writer David Siegel argued (in his writing and consulting) that a very, very similar "9 act" structure was the key to Hollywood screenplay succe

In the mid 90s, writer David Siegel argued (in his writing and consulting) that a very, very similar "9 act" structure was the key to Hollywood screenplay success, based on his study of hundreds of blockbusters. See: http://web.archive.org/web/19980206083911/http://www.dsiegel.com/film/Film_home.html http://web.archive.org/web/19980206083911/http://www.dsiegel... So I agree with others that the 2005 book is more descriptive of long-existing patterns (and requirements of the movie format), than prescriptive and culpable for recent practice.