Liber O vel Manus et Sagittae

How this book fits

Traditions: Thelema The Golden Dawn
Role in the tradition: Primary source Written from inside the tradition: scripture, revelation, a grimoire, a manifesto or a practical treatise.
Public attention: Minor Wikipedia has an article about it in 2 languages.

Read it

Read at sacred-texts.com ↗ sacred-texts.com checked against the Internet Archive's copy of November 19, 2025, because the site refuses scripts · archived copy
Read at archive.org ↗ archive.org

From Wikipedia

Magick, Liber ABA, Book 4 is a book by 20th-century occultist Aleister Crowley with Mary Desti and Leila Waddell. It is widely considered to be Crowley's magnum opus.

From the Wikipedia article Magick (Book 4), revision 1352982267, under CC BY-SA 4.0. Wikidata Q6731054: “book by Aleister Crowley”.

In this study

A short instruction in ceremonial practice: the vibration of divine names, the assumption of god-forms, and the rituals of the pentagram and hexagram, printed in The Equinox in 1909.

The first printing of the Golden Dawn's pentagram ritual. The order had taught it privately to every neophyte since the 1880s; Liber O put it in print.

Cited for 60 sourced claims here, among them correspondences of Anubis, Dadouchos, Hegemon, Hiereus, Hierophant, Horus, Kerux and Maat.