"The Wayfinder's Guide to the Multiverse" is a resource for players and Dungeon Masters in the Dungeons & Dragons universe. It provides detailed descriptions of various planes of existence, including their unique features, inhabitants, and lore, enhancing gameplay and storytelling. This guide serves as a companion to the D&D campaign setting, offering insights into the Feywild, Shadowfell, and other realms. It includes maps, adventure hooks, and tips for integrating these diverse locations into campaigns, making it easier for players to explore the vast multiverse of Dungeons & Dragons.