I'm taking a writing class tomorrow night by Linda Seger, who has published a bunch of books on screenwriting and creating characters. I love taking a writing class from an author before buying their books. You get to see if you like them and what they have to say, and if you do, you buy their books. If not, you pass.

Here are some books Seger has written:

Making a Good Script Great

Advanced Screenwriting: Raising Your Script to the Academy Award Level

Creating Unforgettable Characters