This book is not only the definitive book on magic it is a description of one of the most exciting and exotic AD&D Kingdoms ever. It doesn't clutter up your mind with hundreds of magic items and spells. It shows you how they can be created. In this principality the rulers are usually stranger than any monster you'll ever meet. There's just SO much happening in Glantri. Once your characters arrive in Glantri it'll be hard to get them to leave. If you like AD&D then buy this book.