Have your hero do something sympathetic (such as saving a cat) at the beginning of the film, and the audience will follow him the rest of the way is the eponymous bit of advice in this one. Snyder was a working screenwriter, and his fresh-from-the-trenches advice distinguishes this one from the crowd. A snappy compendium of screenwriting wisdom.

The book that started it all. Three act structure, the importance of the first ten pages, character arc, and more. If you're just starting out or need a refresher in the fundamentals of the craft, this is the touchstone.