The Key of the Mysteries
The theology of numbers; by Eliphas levi (Alphonse Constant), introduced by Aleister Crowley. Illustrated.

The Book of Thoth
Crowley's intense and thorough interpretation of the tarot.

The Genius of Zos
An introduction to the works of Austin Osman Spare.

Historical Hermetic Documents
A handful of articles by Dion Fortune, Julius L. Lachner and others.

The Austin Osman Spare archive
The Book of Satyrs, Spare's mystical art, and more.

Western Mystery tradition
A collection of works with an emphasis on Tarot, by Paul Foster Case and other notable individuals, plus oddities like "metaphysical weight loss."

The Tarot, McGregor Mathers
McGregor Mathers' basic instructions on divination. Differs from later Golden Dawn symbolism

The Qabalistic and Thelemic Works of Frater Achad
Many useful works by Frater Achad, the student of Crowley who discovered the "Key" to the Book of the Law.

The Pictorial key to the tarot
A.E. Waite's esoteric interpretation of the Tarot. Waite can be rightly considered the father of the modern Tarot deck.

The Kybalion
An initiation into the Hermetic arts

H. P. Blavatsky
The works of Madame Blavatsky online, including the Secret Doctrine, and the Veil of Isis.

The Libri of Aleister Crowley
The magical works of Aleister Crowley, in complete versions. Includes The Book of the Law, the Book of Lies, and many more.

Carlo Suares
Selections from Cipher of Genesis and many other works.

Books, articles, diaries of Aleister Crowley
Rare Crowley manuscripts, including letters and diaries.