Cult of the Dead Cow: How the Original Hacking Supergroup Might Just Save the World

The Cult of the Dead Cow is a hacker group based in Texas. They started back in the early days of dial up modems and BBSs. Activities have been closely related with free speech and finding vulnerabilities. Members are of various different political persuasions, with not all agreeing on political activities. There have also been members from affluent and poor backgrounds.  They have found vulnerabilities in Microsoft products, and sought out to have those fixed (much to Microsoft's chagrin.) Hactivism activities have been carried out against those seen to stifle free expression. (Unlike Anonymous, they are not a fan of denial of service attacks as those disrupt speech.) The book also describes what these members have done as they have "grown up", many with tech jobs, though Beto O'rourke has become a politician.