I found the narrative in this book somewhat confusing. It somehow fails to explain what a treatment is and how to draw one up. There are allusions to the job, but never any real substance. Instead, what we get is an analysis of the three act structure, 'beat', and a few other aspects of screenwriting.
There are interesting nuggets in it, but you have to search for them - for instance advice about structuring a television drama differently, depending on whether it is to be interrupted by advert breaks or is to play straight through. But even the nuggets come with a health warning. The content is entirely US-based and is clearly intended solely for someone writing for a US market.
We get advice on how to write screenplays for current serials and soaps, how to pitch an original screenplay, how to adapt a classic. But we never get the advice in enough depth. Each chapter concludes with a short exercise, a couple of questions about what you've read so far. I'm not quite sure why they're there, other than to give the impression that you'll have something to learn from this tome. In fact, they might be the most valuable part of the book - they are about the only things which make you stop and think.
It's not a long book - 69 of its 167 pages are in the form of Appendices, largely lists of addresses for American agents, advice on American copyright, and so on. If you're a British writer, there's not much to learn from this.
Overall, a disappointing mistreatment and not one to be recommended.