Well, first let me say that I know John a little, and his publisher, Greg, a bit more... I was in Greg's place buying a holster a few years ago (he was also distributing for a holster company) when I noticed that the place was stacked with tons of boxes of books. He put one in my hands, and I told him that I wasn't interested in some new version of the Turner Diaries crap that seems to turn up so often around the fringes... He explained that it wasn't anything like that, and suggested I read a little... Well, dang, but I ended up walking out with a copy...
The best place to buy the book is via the ads that were running in SGN a year or so ago, but failing that, Amazon.com recognizes it as one of its better selling titles. IIRC, if you buy it from Amazon, the order is forwarded directly to Greg's place for shipping.