Complete Arcane

From the back cover:

Master Eldritch Secrets
And Formidable Power

Myth and mystery surround those who wield the awe-inspiring might of arcane magic. Whether through ancient knowledge, innate talent, or supernatural gift, these formidable and versatile spellcasters command powers beyond measure

This supplement for the D&D game provides everything you need to expand the power of arcane magic for characters of any class, Along with new base classes, prestige classes, feats, spells, monsters, and magic items, Complete Arcane provides guidelines for spell duels, arcane organizations, and other aspects of a campaign world imbued in magic.