Aleister Crowley was an occultist who dealt in Western esotericism. So either you're into that kind of stuff, or know about it, or it's not really for you. An

Aleister Crowley was an occultist who dealt in Western esotericism. So either you're into that kind of stuff, or know about it, or it's not really for you. And anyway, with a simple search for "Crowley", the first link was his Wikipedia entry with all this information, so it's not exactly like you had to go digging in the dark corners of some exotic private library to figure it out.