Qabalah, Qliphoth and Goetic Magic
Qabalah, Qliphoth and Goetic Magic combines the esoteric tomes together into a practical handbook of texts that go beyond just the Sefer Yetzirah and the Zohar and also the Christian and Hermetic Qabalahs the result is a clear picture of the creation of the Sephiroth (Tree of Knowledge)
One section of the book ends with a range of Qliphotic invocations that you can try yourself and the impression is created that the information was quite possibly learned by actual exploration by Karlsson himself as the ways of contacting these spirits are quite original. He does however warn that the budding Klippothic magician needs to be mentally stable and well balanced, Overall it is a realistic and functional guide to the dark arts.