The Dungeon Master's Guide of the Lejendary Adventure rules.

In this book you'll find 19 pages of ordinary items and their cost, 71 pages of Extraordinary Objects (magic items), and 92 pages of general reference material including:

• How to create new Orders, Abilities, Extraordinary Activations (spells), Extraordinary items, and creatures
  
• A complete explanation of combat, special conditions, bonuses, morale, and much more
  
• A thorough discussion of Fortification and Siegecraft
  
• How to dell out Merits, Demerits, Repute, Disrepute, and Dark Repute
  
• Random Encounter Tables