It's one of the first books about psychic self-defense I ever read. It provides the reader with tons of theory and a lot of practical methods that one way or another help you protect yourself against unwanted spiritual influence. Robert Bruce mix a lot of different traditions and practices together, adding a bit of his personal experiences. This book isn't the only book about psychic self-defense that you should read - you won't learn everything from this single work. But you will learn a lot. Enough to give you the basics which might safe your soul. ( )