DUNGEONS & DRAGONS 4TH EDITION DUNGEON MASTERS GUIDE 2

This core rulebook for Dungeons & Dragons
features advice and rules for Dungeon Masters of all levels of
experience, with a particular focus on running adventures and campaigns
in the paragon tier (levels 11-20). It includes advanced
encounter-building tools (including traps and skill challenges),
storytelling tips to bring your game to life, new monster frameworks to
help you craft the perfect villain, example campaign arcs, a
comprehensive look at skill challenges, and a detailed "home base" for
Paragon-tier adventurers - the interplanar city of Sigil.