Liber 231 is a mysterious document written by Aleister Crowley. It has two sets of 22 sigils and a commentary. Kenneth Grant in NIghtside of Eden gave an interpretation that remains the basis for all work done by magicians since.

Grant uses a system of known as the Tunnels of Set, but Crowley makes no mention of Tunnels why?

Here is your opportuntiy in the Tarot Workshops to learn how Liber 231 works, the ideas behind Kenneth Grant’s system, and how you can use it in your own work.