The third eye is the product of the arousal and interplay of three etheric head centres, and is responsible for extensions of awareness into higher states of consciousness. This book is a practical manual for the development of these powers.
Explaining any concept, occult or otherwise through Quantum Physics is always a winner! But this isn't as much about opening the third eye as it is about what the third eye is. Most of the stars only for QP.
Author did a good job explaining human bodies and attributes associated with it. It's a bit hard to understand at first, so for those who struggled, i would suggest to look at more casual stuff first and move to it a bit later.