The sourcebook "Hunter Book: Avenger" starts with several pages from hunter.net and a short story. Introduction: How to use the book. Chapter 1: Explores the nature of monsters, the Messengers and hunters from Avenger perspective. Chapter 2: Covers Avengers' unique tactics. Chapter 3: Describes the relations of Avengers with other hunters. Chapter 4: Presents the creed's attempts to define their purpose. Chapter 5: Special rules and edges. Chapter 6: Example characters.