What is the setting of The Book of Lies, Which Is Also Falsely Called Breaks: The Wanderings of Falsifications of the One Thought of Frat by Aleister Crowley?

The book primarily deals with Crowley's religious ideas, so even in the small amount of plot that there is, the setting is of a secondary or even tertiary importance. That being said, most of the plot takes place in London but Crowley also spends a good deal of time describing planes of existence outside of Earth.