From the back of the book:
Magic Is Everywhere
Finally, the secrets of the sorcerers are collected in a single volume. Magic - The Great Art - brings great power to its practitioners, and offers the opportunity to do great good or great evil. This book is the complete guide to magic for GURPS Fourth Edition.
GURPS Magic presents an expansive, colorful magic system. Players can create any sort of wizard they can imagine. GMs can adapt the system to fit their own campaign or set adventures in the world of their favorite fantasy author. The rules can be modified to fit almost any world or wizard.
This book is completely compatible with the magic rules in the GURPS Basic Set, with hundreds of new spells and several alternative magic systems, including improvisational magic, symbol magic, clerical magic, ritual magic, and alchemy.
Open, and learn strange new wonders...
GURPS Magic requires the GURPS Basic Set, 4th Edition. The spell ideas in this book can be used with any fantasy game.
This book is expanded by GURPS Magic Spell Charts.