From the back of the book:
"Magic means powers in the world of the Diamond Throne. Witches, runethanes, and magisters can dictate the coruse of history with the spells and runes they wield. They jealously guard their secrets - but this book unveils them all for use in your campaign.
This sourcebook expands the magical options available to all characters in Monte Cook's Arcana Unearthed. Original ceremonies allow characters to forge mystic bonds with allies and even weapons. Additional rules for runes expand their abilities while revealing the secrets behind their true nature. New spells and magic items enhance any character's abilities. And unique mystic sites provide intriguing new vistas for magical experiments and adventure. "