Supplement Books for the classes

Song and Silence (A guide for Bards and Rouges) 

Sword and Fist  (A guide for Fighters and Monks)

Masters of the Wild (A guide for Barbarians, Druids and Rangers)

Defenders of the Faith (A guide for Clerics and Paladins)

Tome and Blood (A guide for Sorcerers and Wizards)

These supplements are for prestige classes, additional feat and other things that the players could use in leveling up their characters.

Supplement Books for the classes

Warring Kingdoms zombieslayer31