There is a sad dearth of books for advanced pagan audiences. This is the first book that I've heard of that addresses the topic of magick from a pagan perspective beyond the 101 level. I thought it was very well done. The theory of how magick works that Polson presents was interesting and believable, but the great strength of the book, in my opinion, lies in the step-by-step guides to exploring different advanced magical techniques.
I say advanced, but this is more of a 202 book than a seminar level work. I am very glad that it was published, and think it's a great first step (or next step?) but I wished that it went further. I am not a serious magician, and I did get some new ideas from the book, but I would've liked it to have been twice as long and covered two or three times as many topics. Sweat lodges, astral portals, and god-hosting are great, and they're definitely not beginner topics. Polson covers them in depth. But what about interacting with non-deity spirits, healing, and creating magickal objects? Most of those topics were mentioned in passing but could easily have gotten their own chapters, and these are just examples. An additional second-to-last chapter talking about further boundaries for the experienced and enterprising magician to push and expand would have been very welcome, at the least.
Nonetheless, this book is an important contribution to the body of accessible neo-pagan material, and I'm awfully glad to have read it. Thanks, Ms. Polson!