Book excerpt: An insightful how-to guide for writing screenplays that uses Aristotle's great work as a guide. Long considered the bible for storytellers, Aristotle's Poetics is a fixture of college courses on everything from fiction writing to dramatic theory. Now Michael Tierno shows how this great work can be an invaluable resource to screenwriters or anyone interested in studying plot structure. In carefully organized chapters, Tierno breaks down the fundamentals of screenwriting, highlighting particular aspects of Aristotle's work. Then, using examples from some of the best movies ever made, he demonstrates how to apply these ancient insights to modern-day screenwriting. This user-friendly guide covers a multitude of topics, from plotting and subplotting to dialogue and dramatic unity. Writing in a highly readable, informal tone, Tierno makes Aristotle's monumental work accessible to beginners and pros alike in areas such as screenwriting, film theory, fiction, and playwriting.