Patrick Nash skips much of the bullshit and gets straight down to brass tacks, giving you practical advice to get your script started, to get your story perfected, and to get your script seen.
He opts to focus on that first short film script to get you noticed, either for directing, or for simply moving on to writing the meatier stuff. Much of his advice can be applied to feature length scripts as well, but the main focus is on short films.
There are three great case studies, showing you actual short film scripts, and then inviting you to analyse them with Nash within the text, giving you a practical point of reference to work back to in future when writing your script. it's invaluable because it shows you how to plan your script, how to write it, and then shows you what the finished product looks like at the end.
A must read for anyone interested in starting to screen write, or simply looking to improve their craft.