The Screenwriter’s Bible - David Trottier
Screenplay - Syd Field
Save the Cat! - Blake Snyder
“Save the Cat!” is a good book. Any newer books with Blake Snyder as the author after 2009 (when he, unfortunately, passed away) are not written by Mr. Snyder. The exception may be “Blake’s Blogs.” I do recommend this and it was part of my grad school course work.