This is a good book for anyone who wants to start practicing Thelema in the tradition of Crowley--Marco Visconti gives VERY in-depth descriptions and step-by-step guides to rituals like the LBRP and the LBRH, and others. It doesn't include Thelemic approaches to Solomonic Magic or Enochian magick though, which was part of what I was expecting to read about when I bought the book.

I still maintain that Aleister Crowley was mostly a fraud that had some caucasian chavinistic fetishes for Ancient Egypt and Hinduism. It's pretty obvious to me that most of Thelema is an amalgamation of Egyptian gods, misunderstood Jewish Kabbalah, highly inaccurate yogic philosophy, and some elements of the Greek Magical Papyri. He was a rather obnoxious white man who used spirituality to manipulate people during the Victorian occult renaissance--Therefore, I tend to not place a lot of value on his systems of occult theory.

That being said, it is interesting to see that many occult practitioners use visualization exercise to summon demons, and that many times they rely on little else. Personally, I would not attempt this, and I would call into question the authenticity of the entities being summoned. Seeing that most of Thelema is based on Crowley's imagination, it makes me wonder if they're even speaking with demons at all, or if they're just talking to their imaginations. I'll stick to Tibetan Buddhism and chöd practice I guess--Nothing like meditating in a graveyard to summon demons and get them to do what you want.