This book actually contains two books in one: Merlin: The Prophetic Vision is one complete book with index and bibliography, and then The Mystic Life is the second book. If you look in the index you will only find into applying to the second book, you need to look in the middle of the book to find the index to the first book which is the first half of this book.
The author analyzes the prophecies of Merlin from various points of view, such as mystical, astrological, historical, etc. It is not much for practical interpretation, but has detailed new age, mystical-type interpretation. As well as the mystic view of the life of Merlin.