I know this is an old thread but I really do not trust content of people who wrote a vast array of small books over a vast amount of subjects. We cannot be a master of that many differences in a path or paths. It annoys me when I see pamphlet like books being thrown out with little bits of info for a not so cheap price and then another and another that says more or less same thing. One book on Djinn magick I found dubious by an author who writes a lot of various books, some are good but not read all. The fact the book got written after he performed one ritual, his words, is not an experience I would value. If I was to write a book on a subject then I would make sure I am adept at it. But now we have every tom, dick and harry writing books without much experience or even a result to be had! this will end up diluting the esoteric world very quickly down the line. I am also sick of these titles like words of power, angels of power, this of power that of power⌠all catchy phrases but nothing of the sort within them! If I see a word of power I want powerful incantations that do something not a sigil, name or genie spirit. I have a lot of books myself as I like to read and get ideas but we can get into a trap of trying to find the next best thing when its already in you FOR FREE. Make shit up, test it out, write down the results. Thats how magick is found. My little rant over 
you are right! I agree your said.
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I have only had contact with two of his books. One was in relation to a group ritual I participated in here on this site a little over a week ago. Will need to wait a while to establish veracity of results or otherwise.
The other was his poltergeist book. I feel very ripped off by the latter. It supposedly teaches a procedure to plague an enemy with poltergeist activity. But its just a very very basic conceptual comment on creating a very very basic thoughtform.
Admittedly I didnât notice before I bought it that it was only 7 pages long. So over $2 per page and the entire content offers nothing that anyone with even the most rudimentary understanding of thoughtforms doesnât already possess.
I am nuts about his books. Nagelâs Book of the Old ones is the best - I am getting in good contact with them and they give me visions. Prayers of darkness is good too.
Some of his stuff you can use for ideas, but add a magick circle. He suggests chanting a chant for Andras, and that guy does not like it when he is called without showing the respect of using a one.
His pathworkings with the djinn in New demon power is also nice.
As I wrote this I got the worst stomach cramp. Couldnât move at all for an hour and it took three hours for it to subside. When I tried to write about it in my journal later I got a nauseous and when I looked in the mirror I had a grey shadow around my head. I couldnât figure out why he would do that, but this morning it struck me he probably is one of those demons that require a target once called lest they attack you, and he had probably taken it as a calling when I wrote about him. So I gave him a target said thank you and goodbye and sent him away, and everything felt lighter.