Here is a list of essential books to read on your third eye journey.

Jonathan Black:  The Secret History of the WorldThe Sacred History- How Angels, Mystics and Higher Intelligence Made our World.  & also The Heretics Handbook

Jo Durden Smith: Nostradamus and Other Prophets and Seers

Philip Gardiner & Gary Osborn: The Shining Ones

Anthony Peake: Daemon

Gary Wayne: The Genesis 6 Conspiracy

Neil Sanders: Your Thoughts are Not Your Own

J.S.Gordon:  The Path of Initiation

Eliphas Levi: The Mysteries of Magic 

Truth Seekah: Spirit Realm: Angels, Demons, Spirits and the Sovereignty of God 

Tricia McCannon: Angelic Origins of the Soul: Discovering your Divine Purpose

Albert Pike: Morals and Dogma of the Ancient and Accepted Rite of Freemasonry

William Walker Atkinson: The Secret Doctrines of the Rosicrucians (Ancient Mysteries Series)

Nathaniel: The Art of Seeing: Your Psychic Intuition, Third Eye and Clairvoyance

Professor Griff: The Psychological Covert War on Hip Hop & Symbology: The Psychological Covert War on Hip Hop Book 2