From the Publisher:
Xanathar's Guide to Everything is the first major expansion for fifth edition Dungeons & Dragons, offering new rules and story options:
Over twenty-five new subclasses for the character classes in the Player’s Handbook, including the Cavalier for the fighter, the Circle of Dreams for the druid, the Horizon Walker for the ranger, the Inquisitive for the rogue, and many more.
Dozens of new spells, a collection of racial feats, and a system to give your character a randomized backstory.
A variety of tools that provide Dungeon Masters fresh ways to use traps, magic items, downtime activities, and more—all designed to enhance a D&D campaign and push it in new directions.
Over 15 new Story Templates exclusive to the Fantasy Grounds version which allows DM’s and players to generate background stories, magic items for adventures or campaigns, and character names
Dozens of new tables for rolling magic items
Over 1000 ready to use random encounters.