"Story: Substance, Structure, Style and the Principles of Screenwriting" is a comprehensive guide that explores the essential elements of storytelling in film. It emphasizes the importance of a strong narrative foundation, focusing on character development, plot progression, and thematic depth. The book serves as a resource for aspiring screenwriters, providing insights into crafting compelling stories that resonate with audiences. The text also delves into the structural components of screenwriting, such as the three-act structure and the significance of pacing. Additionally, it highlights the role of style in storytelling, encouraging writers to find their unique voice while adhering to established principles of screenwriting.