Re-write or re-hash? There is no original content in Chitlik's book. He merely distills the core concepts of screenwriting into mostly his own words, and then puts a "TO DO" beside each one, reminding writers that all the bases need to be covered in the re-write.
No original content doesn't mean the book's form isn't novel or useful. Chitlik has a gift for articulating the basics of screenwriting and for motivating writers to get off our butts and do the grunt work necessary to make our screenplays shine.
I've read all these ideas before and most of the examples and the ridiculously shallow section on applying the re-write process to other formats are clearly filler to top off a very short book, but--
The book works. What you're paying for is an Ariadne--someone to lead you through the agonizing, labyrinthine process of revision, a guide who can chart your re-writing journey in simple, easy-to-follow steps. Chitlik is a master at this, and you can use his book again and again to turn lead into gold.