Aleister Crowley appears as a character in The Demi-Monde: Winter, a novel according to a review at “Book Review: The Demi-Monde: Winter by Rod Rees“.
“What is the Demi-Monde?
It is the most complex and immersive computer simulation ever created, with over 30,000 avatars, known as ‘dupes,’ who think and act exactly like humans (except they require a certain intake of blood daily to survive, which they get from ‘Blood banks.’) Created by the military to provide a way to train soldiers to fight in unpredictable conditions, the world is designed to be in a state of constant warfare. It is divided into sectors which are ruled by exact duplicates of some of the world’s greatest leaders who were also psychopaths, including Nazis, brutal Civil War commanders, Robespierre, and master of black magic Aleister Crowley.”
Apparently Aleister Crowley was not only a “master of black magic” but also psychopath and one of “the world’s greatest leaders” … at least, in this book anyway.