This is a very interesting book. If you want to know more about auras, read "How to read & see the Human Aura" by Judith Collins. She's one of the few people in this world who trully knows a great deal about auras.
This book is one of the most detailed I've read on auras. It doesn't just say things in general about auras;she gives you in-depth energy analysis of individuals along with a painting of their aura. These descriptions can help you understand "details" you may be getting in reading an aura, but other books don't always address. Good book for intermediate/advanced readers.