There is a reason why you can’t buy this book. But if you really want to get it, Amazon gouges you $79 for the paperback version! Why is this? Would this quote have something to do with it?
As “6 million” merely represents some token in Jewish dogma, some cabalistic hocus-pocus, there is no reason to attach any special importance to its numerical value.
Google Books has a free online version here offered by the generous author himself.