Here is a collection of websites, books and media which we strongly advise exploring or viewing at least once. 

Calling Crane in the Shade 

“One of the very first sites I want to acquaint people with is Joel Biroco’s site. Joel is a consummate artist and a hard thinking individual when the matter turns to eastern metaphysics. His site is both elegant and powerful and he will point you in the right direction with respect to the I Ching without exception. Do yourself a favor and check him out.” 
Magister Ouroboros 729

Secrets of the I Ching 

(Formerly, The Wisdom of the Changes) Bettina Wilhelm, filmmaker and granddaughter of Richard Wilhelm, author of the best translation of the I Ching worldwide, explores the history of the I Ching and the excellent scholarly work of her grandfather. Highly recommended. Available on Vimeo, Amazon, Google Play, among others. 

The I Ching Sequencer @ Tao Lodge
<>        “At the side is a scale showing how many hexagrams of the 64 have played and position in the sequence. You can even play a techno soundtrack to accompany the animation. A fascinating and beautifully executed piece of work. An elegant hexagram sequence is like a mesmerizing dance.” – Biroco, author of Calling Crane in the Shade (site)

G.W. Leibniz: Texts and Translations
“Gottfried Wilhelm Leibniz (1646-1716) was one of the most distinguished intellectual figures of the early modern period. Celebrated as a philosopher and mathematician, he also made significant contributions to the natural sciences, historiography, legal theory, and linguistics—to mention only a few of his interests. He is often described as the last universal genius: a thinker whose range extended to all that was known in his day.”  – Donald Rutherford

Ritman Library/Bibliotheca Philosophica Hermetica 

The Ritman library was founded by the Dutch Bibliotheca Philosophica Hermetica foundation in 1984, under the direction of Joost Ritman. A digitization of the library’s collection has been underway since 2017. 



The Abrahadabra Institute is not associated with any other magickal order, but our founder was initiated by Hymenaeus Alpha (Grady McMurtry) into the O.T.O. Therefore, at least Hermetically speaking, our so-called “flowering tree lineage” (an old master-apprentice concept used widely in Europe for both magick and mundane professions) traces back to McMurtry, who was m1thr0s’ only initiator into the mysteries, so it is fair to say he is not an insignificant figure in our organization. Also, he is generally well liked. Gerald Edward Cornelius has composed a really extraordinary site that relates a lot of little details about Hymenaeus Alpha that you might not have picked up in your visit to the City of the Pyramids. The site is not immune to the drama llama and there is some eye-rolling to be had at some of the gossip flying around, but what would an O.T.O. or Thelemite website be without infighting and finger pointing?