This book could be of interest to those who are awakening their light body or interested in Ascension, which is basically detaching from the material and moving closer to the spiritual and therefore gaining more light. I won't pretend to understand it all, (it is by Archangel Ariel, channelled by Tashira Tachi-ren), but it does give a lot of interesting information about the changes people can undergo on a spiritual path.
The preface clearly states that all the ideas in the book are just opinions and it is up to the reader to decide what is true for them.
The best part of the book I thought was the tools section. There are some lovely invocations or prayers. Some of these invocations are for the rays of coloured light of higher energy that we can call upon to heal and ascend. I think people who like using colour to heal or are familiar with Diana Cooper's work might like these as well. I love this book and wouldn't hesitate to recommend it to anyone committed to their spiritual growth.