15 excellent lightly used books covering all aspects of filmmaking:

From Reel to Deal by Dove SS Simens
How to write High structure, high-concept movies by Rob Tobin
Heroes and heroines sixteen Master archetypes by Tammy Cowden
The DV Rebel's guide by Stu maschwitz
Save the cat by Blake Snyder
The third act by Drew Yanno
The screenwriters Problem Solver by Syd field
Creative producing from A to Z by Myrl Schreibman
How to fund your film by Adam Davies
Extreme DV at used car prices by Rick Schmidt
Save the cat Strikes Back by Blake Snyder
The eye is quicker by Richard Pepperman
Setting up your Shots by Jeremy Vineyard
The ultimate writer's guide to Hollywood by Skip Press
Contracts for the film and television industry by Mark Litwak

Many of these books are classics in the industry.
Price firm.