There is a wealth of helpful material in this book, aimed at people who want to write screenplays. The problem is that the book is poorly written and organised. The author begins discussing one topic, only to drift onto other subjects, which should be properly dealt with elsewhere.
There are also a lot of typos and badly written sentences that should have been edited out. I don't think the following sentence would have escaped the attention of any observant editor:
"The layout for a single colunm [sic] layout for script is shown on the following pages."
That is just sloppy writing. And there's a lot more of it. I may be wrong, but I got the impression that the book had been pasted together from a lot of lecture notes. There are also some typographical errors in the sample screenplay layouts (confusing use of different fonts, mostly)
It's true that the author gives a lot of examples from recent films, but often it is not clear what we should learn from them. Far too much space is wasted paraphrasing the plots of movies to no great purpose. And why reproduce an irrelevant, scribbled note from Cecil B DeMille to the author's father-in-law, unless it is mere name-dropping?
Don't get me wrong - there's a lot of valuable advice in this book, but it's hemmed in on either side by elliptical, irrelevant comments, or platitudes such as the following:
"The audience may 'suspend disbelief', but don't try their patience. If they get ahead of you, it's heads down and popcorn time for them, and curtains for you!"
Well, what does that really mean, apart from, "Make it believable"? Surely, everybody knows that - it's how to make it believable that's the tricky part.
With the help of some stringent rewriting, editing and restructuring, this book would probably be worth 4 stars. As it stands, this is far from an ideal introduction to screenwriting.