"This book is not an attempt to provide a broad survey of current Thelemic "offerings," e.g. the multiplicity of recent "orders" and "schools of interpretation." We acknowledge one A.'.A.'. and one O.T.O."

-from the James Wasserman Introduction to The Weiser Concise Guide to Aliester Crowley by Richard Kaczynski.

And if you haven't heard...

duplexity