Max Demian has published a book on Aleister Crowley titled "The Secret Wisdom of 666". See: http://www.lulu.com/
An essay by the U.S. Grand Lodge of the Ordo Templi Orientis.
Their home page is at: http://otohq.org/oto/
"O.T.O." stands for Ordo Templi Orientis, the Order of Oriental Templars, or Order of the Temple of the East. "O.T.O. is an Outer Thelemic Order",
and is the "first of the great Old Ĉon orders to accept The Book of the Law, received by Aleister Crowley in 1904 EV.
Amazon.com's online bookstore lists the following books on Thelema:
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Links:
The Order of the Thelemic Golden Dawn is a "Magical-Religious-Scientific
Order dedicated to the teachings of Aleister Crowley" at: http://www.tgd.org/