The wizard Tasha, whose great works include the spell Tasha's hideous laughter, has gathered bits and bobs of precious lore during her illustrious career as an adventurer.
Full of expanded content for players and Dungeon Masters alike, this book is a great addition to the Player's Handbook. Baked in players will find more rule options for all the character classes in the Player's Handbook, including more subclass options.
Thrown in for good measure is the artificer class, a master of magical invention. And this witch's brew wouldn't be complete without a dash of added artifacts, spellbook options, spells for both player characters and monsters, magical tattoos, group patrons, and other tasty goodies.