Going off of the Golden Dawn system of Tarot, "Portable Magic" by Donald Tyson presents a system of ritual magic where the only tool needed and used is a standard deck of tarot cards. Aside from visualization and a clean surface to lay the cards on, that's it. No other materials are needed. The book has an apt title, as it can be done anywhere or anytime so long as you have a tarot deck.
I admit that, although I've been looking for a book like this for years, I didn't pick this one up at first. I've come across other sources who talk about forms of magic using the tarot, but wound up disappointed each time. Few were about the tarot as a stand-alone tool, and those that were only gave a sampler of spells but didn't give the individual a technical foundation to go off of for the workings of the system. Still others only mentioned the use of individual tarot cards as charms and talismans. So, I figured this would be another like those. Once I finally picked up this book, however, I realized that it is the tarot magic book I've always wanted!
The first part of the book, chapters 1-4, go through the introduction of the book, then into the history of the tarot, it's structure and order, and its ties to the Hermetic Order of the Golden Dawn. Of this section, I found the parts on its known factual origins and the various groupings of the cards to be of great interest.
In chapters 5-10, Tyson goes through a lot of theoretical material on the tarot itself, apart from divination or magic. First he goes through the correspondences and cosmology involved with the Major Arcana (or Trumps) of the tarot, particularly from the standpoint of the Golden Dawn system. After this he goes into the correspondences of the numbered cards and court cards of the Minor Arcana. Then he discusses the placement and correspondence of the numbered cards with the Sephiroth on the Qabalistic Tree of Life.
Chapters 11-17 are where Tyson really starts getting into the meat of the system, starting by introducing the symbolic tools of this system of tarot magick: the point, the ray, the circle, the triangle, and the cross. After the introduction, he goes through each one in its own chapter, going more in-depth and giving an exercise for each tool. Having gone into detail about the tools, he shows how they're all brought together to perform a general ritual of tarot magick.
With theory and basic methods covered, Tyson goes further into the mechanics of the system throughout chapters 18-21. In these chapters, he covers planetary modifier cards from the Trumps, the meanings of the numbered cards, and then details their use together. He also adds a chapter summarizing what's been covered so far, although I'm not sure it was necessary.
The final part of the book includes chapters 22-26 and an appendix. In the final chapters he covers finer points of the system and gives examples of use. Finally, the appendix gives details about Tyson's personalized version of the Golden Dawn tarot correspondences which he alludes to several times in the book.
There are only two things I can think of that Tyson could have done better in this book. First, it seems to me that in discussion about the use of planetary modifiers he suggests using them without regard to actual astrological conditions. I disagree with this, because I think that if you include astrological influences in your work, you should pay heed to what's actually going on there instead of trying to say one planet is in its ruling sign when it may not be. It's like trying to tell someone you're wearing a pink blouse when, in fact, you're wearing a black t-shirt. Second, I felt like there was little or no examples of how to use this system of ritual tarot magic for High Magic, or magic for spiritual and personal development and contact with one's Higher Self. I do feel they're minor, though, and can be dealt with using a little knowledge, sense, and skill.
Overall, I really enjoyed this book and can say with confidence that I am going to get much use out of this system that Tyson has developed. His writing style and arrangement throughout the book is very good and leads you from the basics of the system into the more complex parts. Speaking of the system itself, I think it's very solid. I found the concepts easy to grasp especially with my past knowledge and experience. Even someone with relatively little knowledge and experience could learn something from it. All in all, I'd recommend this book to anyone interested in the tarot, whether for divination, magick, or both.