http://usedkey.wordpress.com/2011/10/24 ... roduction/
That is a link to a blog that has a series of entries that are question & answer articles about "Mastering Witchcraft". One of the interviewees is Jason Miller, if you are a fan of his. You follow through to the successive articles by clicking on the link above and to the right of the title of the current article (e.g. the link to the next one is tagged "Look what's popped up").
I am rereading the book and was considering asking some of you here if you'd like to have our own discussion of it. There is a square of Mercury and a conjuration of Vassago that might appeal to some of you magicians.