From the back cover:
This volume collects all the new spells and the magic rules from Monte Cook's Arcana Unearthed variant player’s handbook. Use them to enhance your own d20 System games. You can use everything in this book alongside the 3rd Edition or revised 3rd Edition Player’s Handbook.
Magic is fluid and subject to the whims of the individual caster, thus it remains always mysterious and fascinating. This 93-page book will expand your available spellcasting options dramatically. Here’s what you’ll find inside:
• Chapter One: Magic:
Anyone who’s a little tired of the traditional “prepare, then cast” method of handling spells will love the ability to alter a spell’s power and weave together minor spells into larger ones. Also, spell templates let you customize spells to fit your character.
• Chapter Two: Spells:
This book offers dozens of pages of new spells, each complete with guidelines for heightening and diminishing its effects and for creating a magic item from it.