Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Definitely worth it and useful.

There are a lot of straightforward, practical, Step A, Step B, Step C books on how to write a screenplay. This book is not exactly that, although it definitely gives a lot of great insight. The best thing about this book is that it takes you through all the emotions you feel as a new screenwriter, all at the exact stages when you'd feel them. So many times I've wished I could call up Lawrence Kasdan or some other great mentor/screenwriter and see what he'd have to say, but Richard Krevolin does this for us! It's a really helpful book and he seems like a great guy.