This is a very recommended read, indeed mandatory for everyone who is interested in actually "working" (with) the tree of life. I mean, there is much Kabbalah-101 material out there, of every quality imaginable. But mostly it is just an intellectual description and systemization, being essentially an exercise in speculative metaphysics. This isn't the case with "Magical States of Cosnciousness" which gives very to the point, precise instructions for pathworking between the sephiroth, as it were. the authors give some introductory remarks, preparatory instructions after which the bulk of the book is comprised of magico-imaginative texts as I would call them, which should fascilitate an altered state of mind and experience of the sephirotic pathways.