Recent The Verge post by Joseph L Flatley about Simon’s The Necronomicon (which I tend to call The Simonomicon) at The cult of Cthulhu: real prayer for a fake tentacle mentions Aleister Crowley. There’s also mentions of The Magickal Childe bookshop, Kenneth Grant, Austin Osman Spare and more.

“In 1945, a 20 year old Kenneth Grant spent several months working as the secretary for Aleister Crowley, a ceremonial magician, author, mountain climber, and possibly even spy for British intelligence during World War I. Crowley’s books are key texts of modern occultism, and his reputation as “The Wickedest Man In The World” or simply ‘The Beast’ has given him pride of place in any number of heavy metal songs — not to mention a choice spot on the cover of the Sgt. Pepper’s Lonely Hearts Club Band album (the top left, chilling with Mae West and Lenny Bruce). At the end of his life, Crowley was unable to afford a secretary, so he let Grant fill that role in exchange for magical instruction. For a short while at least, Grant was The Intern of The Beast. By the time he passed away in 2011 at the age of 86, Grant had produced nine volumes that constitute what he called ‘The Typhonian Trilogies,’ which explored the connections between all manner of occult systems — incorporating voodoo and tantra and elements from the work of 20th century magician and the artist Austin Osman Spare.”