New Prestige Classes in the Advanced Player's Guide:

Battle Herald: This class blends the best of the bard and the cavalier to create a character that can truly take control of the battlefield, granting big bonuses to his allies.

Holy Vindicator: Mixing cleric and paladin, the holy vindicator is the perfect weapon to deliver his deity's will, usually at the end of a sword.

Horizon Walker: A class that nearly anyone can qualify for, this class is perfect for adventurers that travel the world and the planes beyond, granting a wide variety of bonuses based on terrain.

Master Chymist: A prestige class for alchemists whose minds have split into two because of repeated use of their mutagen—now they are part monster and part dangerous madman.

Master Spy: Skilled at the art of lying, able to take on the appearance of others easily, and even able to hide their alignment from spells, the master spy is perfect for infiltrating and hiding with the enemy.

Nature Warden: Bonding closely with her animal companion and the lands around her, the nature warden is a force of nature, deadly when protecting the lands that she calls home.

Rage Prophet: Sometimes the spirits that speak to oracles drive them into a mad, rage-filled frenzy. This mix of barbarian and oracle is just that, blending spells and rage together.

Stalwart Defender: A revision of the Dwarven Defender and no longer just for dwarves. This class is known for holding its ground and taking whatever punishment the enemy throws at it.