From the back cover: Requires Old-School Essentials Advanced Fantasy Quick reference for Old-School Essentials Advanced Fantasy rules and procedures: Game procedures: Summaries of the core rules of the game, including the procedures for dungeon, wilderness, and waterborne adventuring, and combat. Monsters: Complete dungeon encounter tables and monsters listed by Hit Dice. Player characters: All tables pertaining to PCs, including ability score modifiers, saving throws, class skills, spell progression, and native languages. Downtime and equipment: Common PC activities between adventures, plus full equipment lists, including mounts, dogs, and vehicles.