This appears to be a lightly summarised excerpt of Houston&#x27;s (fascinating) book &quot;Shady Characters&quot;.  As mentioned briefly at the end of the article, he has an interesting blog where he discusses more:  <a href="http:&#x2F;&#x2F;www.shadycharacters.co.uk" rel="nofollow">http:&#x2F;&#x2F;www.shadycharacters.co.uk</a> .