From the introduction: This guide contains notes and information for Dungeon Masters who are running the Tyranny of Dragons path (Hoard of the Dragon Queen and Rise of Tiamat) for Dungeons & Dragons 5th edition. It features links, errata and advice on how to run things most effectively and information to make it easier for you to foreshadow the story and make it feel more fleshed out. User summary: Note this is a "third-party" supplemental guide to the series of adventures. The commercially published adventures themselves are not included but are required to use this guide.