 The book also contains GM commentaries on handling animal encounters, hunting and trapping, animals as companions, and how to create new animals.This supplement describes several hundred animals and monsters, mostly organized by habitat (e.g., arctic, desert, forest, jungle, swamp and subterranean) plus dinosaurs, domestic animals, otherworldly creatures, and "loathsome crawlers"; the book also includes rules and guidelines for game-mastering animals, animal companions, and hunting.