D&D (5E) - Dungeon Master's Guide

The Dungeon Master’s Guide teaches you how to create entire D&D worlds for your players to explore. It walks you through the essential elements of a good adventure and shows you how to be the architect of a fun campaign that your players are sure to remember. It also helps you adjudicate the rules in a variety of situations and gives you the tools you need to improvise when the players lead the story in unexpected directions.