No-Stick (Gnostic) Gospels, a Great Introduction to the Secrets of Gnostic Spirituality
"The Gnostic Mystery," an online book that will reveal to you the secrets of the Gnostics:
The Gnostic Mystery
https://members.tripod.com/~andrea65/gnostictitle.html
Chapter Three is my favorite.
There is Light (and Sound) Within,
SantMat_Mystic_(James)