Adventurers League Dungeon Master's Guide (Tales from the Yawning Portal)

From the introduction: The D&D Adventurers League is the official organized play system for Dungeons & Dragons. Players can create characters and participate in any adventure allowed as a part of the D&D Adventurers League. As characters complete adventures, the players track their experience, treasure, and other rewards, and can take those characters through other adventures that will continue their personal story.