From publisher blurb:
Heroes of Primal Might and Ancient Power!
From the bright towns and darkened wilderness they come: mighty heroes intent on exploring dungeons, slaying monsters, and battling evil.
This companion to the Player's Handbook® core rulebook introduces the primal power source, which draws on the spirits that preserve and sustain the world. Player's Handbook 2 includes four classes tied to the primal power source: the barbarian, the druid, the shaman, and the warden. It also presents four new arcane and divine classes: the avenger, the bard, the invoker, and the sorcerer.
This essential book for D&D® players contains other exciting options, including new races, powers, feats, paragon paths (including racial paragon paths), epic destinies, magic items (including totems), rituals, and a background section designed to help you develop your character's history and personality.